Occupation of FSB Coral, 12 May 1968 On the night of 11/12 May, only a few hours before the Australian redeployment was scheduled to commence, forces from US 1st Division operating in AO Surfers were attacked just west of the proposed landing zone (LZ). Continuing through the night and into the following morning, the fighting prevented the Americans from leaving the area and led to initial delays in occupying FSB Coral. Further delays arose after the terrain around the proposed LZ was found to be unsuitable for helicopters, and Shelton was forced to designate a new location to the south-west for his battalion. Meanwhile, the American company providing security for the lead Australian elements had to redeploy to secure the new LZ. Communications were problematic throughout the operation and this further compounded the delays. The first infantry company to fly in—B Company, 3 RAR under the command of Major Bert Irwin—was already airborne and Shelton directed them to the new LZ. On landing, Irwin moved quickly to the original position, and despite rapidly clearing it, the insertion was further delayed. 1 ATF was not well practised in flying in and setting up a large fire support base, and a poorly co-ordinated, prolonged and dislocated operation caused considerable delay in getting on the ground, and the scattering of some units. Confusion continued to affect the operation, with 161st Battery, RNZA arriving by
CH-47 Chinook before FSB Coral was ready, and being forced to land in an improvised LZ in a clearing to the south-west. Meanwhile, the continued presence of American forces in AO Manly also prevented 3 RAR from deploying as planned, and as the battalion began landing it was forced to remain on the western side of the FSB. 102nd Field Battery, the direct support battery for 1 RAR, was subsequently landed at FSB Coral and Major Brian Murtagh, second-in-command of 12th Field Regiment and the artillery tactical headquarters, was subsequently designated as the FSB commander, even though his guns were now physically dislocated from each other. These delays in turn affected the fly-in of 1 RAR, with the companies forced to wait at the departure point in AO Columbus before they commenced the air move to FSB Coral. Hughes visited Bennett at FSB Coral at 15:30 to discuss aspects of the defence, as well as events planned for the following day. The deployment of the second battalion was not complete until 16:10, with the 1 RAR Mortar Platoon arriving on the last flight, more than four hours late. It became clear to Bennett that 1 RAR would need to deploy to the east of the FSB, and with just two hours before last light the companies were moved into hasty defensive positions, the last of which were not established until 17:00. Due to the hurried deployment, by dusk the two battalions of 1 ATF and their supporting elements were scattered around FSB Coral in four roughly connected groups, rather than in a co-ordinated defensive position. The task force headquarters advance party and part of its Defence Platoon were located centrally, yet the task force tactical headquarters and the artillery tactical headquarters under Lieutenant Colonel Jack Kelly—Commanding Officer of 12th Field Regiment—both remained in Bearcat. Hughes was not present either, having left Bearcat to attend to matters at the task force rear headquarters at Nui Dat, and was due to move forward with the tactical headquarters to FSB Coral the following day. There had been little opportunity for co-ordination, with the Australian infantry strung out along the routes away from FSB Coral in preparation for their move the next day. 3 RAR was responsible for the security of FSB Coral, with D Company defending the north-west approaches, while the remaining three companies were dispersed over to the west, spread between the FSB and the 161st Battery, RNZA gun positions to the south-west. 1 RAR occupied the eastern approaches, with its rifle companies dispersed over harbouring in night ambush positions, while C Company was isolated to the south-east picketing the road to Tan Uyen in order to provide security for the convoy due to arrive from Bearcat the following day. Bennett kept his anti-tank and assault pioneer platoons inside the FSB to protect the battalion command post, while the mortar platoon would be particularly exposed, being located adjacent to the 102nd Field Battery gun position in an open area on the outer edge of the base facing to the north and east. The rifle companies to the north-east provided the only protection, yet there were large gaps between these positions and they could be easily bypassed. Although the Australians made further efforts to co-ordinate their defences prior to last light, attempting to tie in their positions to achieve mutual support between the sub-units, these arrangements remained incomplete as night fell. Command posts were dug in and weapons pits and
shell scrapes were commenced, yet many were not completed to any depth due to a lack of time, while a heavy rainfall started at 18:00 and soon filled the pits with water anyway. No
claymore mines or barbed wire were laid out either, as the wire had not yet arrived, while lack of materials also prevented the construction of overhead protection.
M60 machine-guns were placed out around the perimeter, but there was no time to test fire them or to properly tie in their arcs of fire. Meanwhile, 90 mm
M67 recoilless rifles (RCLs) from the 1 RAR Anti-Tank Platoon armed with
high-explosive anti-tank (HEAT) and anti-personnel
flechette ammunition were sited to support the forward machine-guns. Due to their prior experiences fighting the VC in Phước Tuy Province, the Australians were not overly alarmed despite the defences at FSB Coral suffering due to the hasty deployment and, although the recent fighting involving the US 1st Division only to the west may have been added cause for concern, its extent was unknown to the Australians at the time. Expecting the PAVN/VC to be operating in small groups while trying to avoid battle as they had done during the last three weeks, there was little thought of a major threat to the FSB. Commencing night routine, sentries were posted while the rest of the Australians stood down to get some sleep.
First attack on FSB Coral, 12/13 May 1968 Unknown to 1 ATF, the headquarters of the PAVN 7th Division was located approximately to the east of FSB Coral and several units of the division were also based in the vicinity. The PAVN 165th Regiment was operating to the north and the 141st Regiment to the east, while the battalion-strength 275th Infiltration Group had only recently arrived, having left the
Ho Chi Minh Trail on the
Cambodian border just 48 hours earlier. The PAVN divisional commander had quickly dispatched reconnaissance elements to observe the fly-in of the Australians and their defensive preparations during the afternoon, and they soon reported the opportunity to attack the exposed gun positions of the 102nd Field Battery. One battalion of 141st Regiment, augmented by the 275th and 269th Infiltration Groups, was subsequently tasked to attack FSB Coral that night. This reconnaissance had not gone unnoticed by the Australian infantry, however, and companies from both 1 RAR and 3 RAR had fleeting contacts with small groups of PAVN at last light and into the evening. D Company, 1 RAR—under Major Tony Hammett—contacted a ten-man PAVN group while moving into ambush positions north of FSB Coral late in the afternoon. In a brief exchange the PAVN broke contact after losing one killed, firing
Rocket-propelled grenades (RPGs) into the trees above the Australians and wounding one of them. During the evening B Company, 1 RAR—under the command of Major Bob Hennessy—had a further contact to the east with another ten-man group. Later, Major Colin Adamson's A Company detected 20 PAVN moving on the perimeter utilising newly issued
Starlight scopes and subsequently killed and wounded some of them. However, such events appeared to be chance encounters and caused the Australians no particular concern. By midnight the rain had stopped, and five minutes later the 1 RAR mortar position was probed and a fire-fight ensued, resulting in possibly three PAVN killed. Later it became apparent that they had been marking assault lanes, while at 02:25 three PAVN from a forward reconnaissance party walked into a D Company, 1 RAR ambush and in the ensuing contact one was killed before they again broke contact, firing RPGs that killed one Australian and wounded 11 from a single
platoon. Yet despite minor clashes the PAVN successfully bypassed the Australian rifle companies, conducting a forced march under cover of darkness and rain to dig in within of FSB Coral undetected. Finally at 03:30, rocket and mortar fire began falling on FSB Coral, concentrating on the 102nd Field Battery and the 1 RAR Mortar Platoon positions in an intense bombardment lasting five minutes. Following a ten-minute pause, flares signalled the start of the assault. Intending to capture the field guns, two PAVN companies rushed the Australians from the north-east firing their
AK-47 assault rifles, with the 1 RAR Mortar Platoon taking the brunt of the initial attack, while the 1 ATF Defence Platoon was also pinned down by heavy machine-gun fire. The New Zealand howitzers and 3 RAR mortars began firing in support, however they failed to halt the PAVN and the initial assault succeeded in over-running the 1 RAR mortars, killing five and wounding eight. The flank of the main assault force then ran through the position at speed before moving on towards the gun position. During their earlier reconnaissance, the PAVN had likely observed the guns to be laid facing east and had probably planned to assault from the north as a result, yet shortly before the main attack the battery had fired a mission to the north and the guns were now directly facing their axis of assault. Moving in long straight lines across a frontage of 150 to 200 men, the main PAVN assault moved against the gun position as the Australian gunners opened fire over
open sights with flechette rounds at point blank range, with thousands of darts ripping through their ranks and breaking up successive waves into small groups. Amid the confusion, follow-up sections hesitated upon reaching the mortar position, while other groups skirmished around the flanks and between the artillery and mortars. Meanwhile, the 1 RAR Anti-Tank Platoon—commanded by Lieutenant Les Tranter—also engaged with flechettes from their 90 mm RCLs, firing across the front of the mortars and relieving the immediate pressure on them. However, with the PAVN having successfully achieved a break-in, and faced with the possibility of imminent annihilation, the 1 RAR Mortar Platoon second-in-command—Lieutenant Tony Jensen—was forced to direct the RCLs onto his own position, to which Bennett agreed. As the PAVN attempted to turn the captured mortars against the Australians, the flechette darts swept the area, clearing everything above ground, causing heavy casualties among the assaulting force and damaging several mortar tubes. Elsewhere, the PAVN assault had reached the Australian gun position, over-running two guns as desperate close quarters fighting broke out between the emplacements. The attackers subsequently succeeded in capturing No. 6 gun on the extreme edge of the gun-line and then attempted to destroy it with
satchel charges. In both the mortar and artillery positions the PAVN and Australians occupied adjacent pits, fighting each other at close range for their possession. The gun position officer—Captain Ian Ahearn—co-ordinated the defence, and the Australians finally drove off the assault with grenades and small arms, as well as flechette rounds fired from the Anti-Tank Platoon. Meanwhile, with the assault falling mainly on 1 RAR and 102nd Field Battery, to the west 3 RAR had largely remained out of contact. Although the PAVN troops were well trained and equipped, they were ultimately unable to prevail against the superior firepower of the Australian infantry and gunners, which had turned the battle in their favour. Throughout the night, fire support was co-ordinated by the 1 RAR command post and the fire support co-ordinating centre, which controlled integral fires from 102nd Field Battery, its direct support battery, as well as from 161st Battery RNZA and the 81 mm mortars from 3 RAR. Yet the Australian gunners soon ran out of flechette rounds, and they were forced to use standard high-explosive with their direct-action fuses set to 'delay'. The guns were then depressed to fire the shell at the ground approximately in front of the emplacement, which caused the round to ricochet and explode in the air above the heads of the assaulting force, an expedient which proved very effective. The Australians were also supported by artillery from neighbouring American batteries that were in range, as well as by aerial strafing from helicopter gunships and continuous illumination by flares. Forward observers adjusted the artillery to within of the Australian position, while
AC-47 Spooky gunships fired thousands of rounds into the assaulting forces. After an hour of intense fighting, by 04:30 the main attack began to falter and the PAVN subsequently withdrew into a rubber plantation to the north-east, carrying many of their dead and wounded. However, in an attempt prevent the Australians from following them a company-sized force remained, and the Australian gunners attempted to engage them with their remaining flechette rounds and high explosive. Taking advantage of the extinguishing of a fire that the Australians had been using to direct the helicopter gunships, the PAVN again attacked at 05:00 in an effort to further cover their withdrawal. Greatly reduced in strength, the attack was quickly broken up in a crossfire of high explosive and flechettes. A series of sporadic contacts then took place between the Australians and withdrawing PAVN, while at 05:30 a helicopter light-fire team became effective and forced the PAVN rearguard to abandon its positions. Also during this time, rockets and mortars had landed on B Company, 1 RAR to the south-east, killing one Australian and wounding another. At 05:45, 161st Battery RNZA began firing on likely withdrawal routes as the pre-dawn light began to appear. The Australians then began a sweep of their position, with the 102nd Field Battery clearing the gun position while Bennett accompanied the 1 RAR Anti-Tank Platoon and a regimental medical officer's party to clear the rest of the perimeter. PAVN soldiers were subsequently located, with the last killed in the gun position at 06:10. The two patrols then met in the mortar position while a patrol from 3 RAR carried out a similar sweep from north to south, and FSB Coral was finally cleared by 06:25. By 06:30 the evacuation of the Australian dead and wounded began by helicopter. The PAVN finally completed their withdrawal by 08:00. The fighting had been costly for both sides. Australian casualties included nine killed and 28 wounded, while one howitzer and two mortars had been damaged. PAVN casualties included 52 dead, who lay strewn around the perimeter, while 23 small arms and seven crew-served weapons had also been captured by the Australians. While
Radio Hanoi quickly announced a major PAVN victory there was little doubt that the Australians had convincingly repulsed the attack, even if they had come close to suffering a military catastrophe, with the task force headquarters itself nearly being destroyed. The initial delays during the fly-in had left the defenders spread haphazardly and, had the PAVN assaulted without the preparatory fire that ultimately alerted the Australians, the result may have been different. Equally, the fortunes of war had resulted in the Australian guns being laid in the direction of the main PAVN assault, and the firepower they afforded had probably been decisive. The occupation of FSB Coral was one of the first such operations conducted by 1 ATF and many of the deficiencies evident had been due to this inexperience.
Command and control had been insufficient and in hindsight the lack of co-ordination in setting up the defence could have been avoided with the appointment of a local defence commander. The absence of proper aerial reconnaissance prior to insertion had also resulted in units and their supporting elements landing on unsuitable ground in full view of the PAVN, while the delay in the insertion of the second battalion denied them enough time to establish their positions before night fell. Failures in the assessment and timely distribution of intelligence were also identified.
1 ATF consolidates in AO Surfers, 13–15 May 1968 The 1 ATF forward tactical headquarters arrived from Bearcat by CH-47 on 13 May, while additional personnel and stocks were brought in by road convoy to establish the forward task force maintenance area. Hughes arrived at 08:00 and directed Bennett to redeploy his companies in all-round defence of FSB Coral, with 1 RAR consolidating their defensive arrangements with wire, sandbags, overhead protection and claymore mines, while tripod-mounted machine-guns were also emplaced to fire on fixed lines. Meanwhile, 3 RAR established FSB Coogee in AO Manly west, with C Company securing the fire support base while the other three rifle companies conducted search operations which resulted in one being Australian killed. 161st Battery RNZA was then redeployed by air to Coogee.
M113 armoured personnel carriers (APCs) from A Squadron, 3 CAV (less one
troop)—under the command of Major John Keldie—arrived at Coral the same day, after escorting the rear echelons and 155 mm
M109 self-propelled artillery from
A Battery, US 2/35th Artillery Regiment. The M113s were then split between the fire support bases, with 1 Troop assigned to 1 RAR and 2 Troop to 3 RAR, with Keldie appointed as local defence commander at FSB Coral in order to co-ordinate the actions of units on the perimeter.
1st Field Squadron also provided engineer teams to each combat arm, while other elements prepared command post bunkers and fortifications within the fire support bases. The unsuccessful assault against FSB Coral on the night of 12/13 May had demonstrated that the PAVN would react violently to Australian attempts to control AO Surfers, and with 1 ATF deployed astride a key route to Saigon and threatening PAVN/VC bases and staging areas located nearby, further heavy fighting was expected over the following days. In response, the Australians were forced to refine their tactics and Hughes decided to establish strong defensive positions in order to destroy the PAVN by fire, rather than by the painstaking patrolling more familiar to the Australians. The FSBs would be heavily defended by night, while the battalions would conduct defensive patrols by day. Later, fighting patrols up to company-size with armoured support would then be used to locate and destroy the VC main force bases. As such the Australian concept of operations subsequently evolved from one of searching and clearing in order to locate and cut infiltration and withdrawal routes, into a series of reconnaissance-in-force operations from heavily defended bases. Meanwhile, in AO Manly, 3 RAR continued patrolling for the next seven days, successfully ambushing staging areas and infiltration routes between 13 and 19 May for the loss of one soldier killed. On 14 May there were patrol clashes in AO Bondi, as both sides tried to determine the intentions of the other. The Australians sent out platoon-sized defensive patrols between from Coral and in nine contacts they suffered three killed and five wounded, while PAVN casualties included 12 killed and two wounded. Later, two more Australians were wounded by an RPG fired into FSB Coral. During the afternoon, the patrol activity resulted in heavy fighting, and two separate actions fought within half an hour of each other by different platoons from 1 RAR led to two Australians being awarded the
Distinguished Conduct Medal (DCM)—Lance Corporal David Griffiths and Private
Richard Norden. Norden's DCM was upgraded to the
Victoria Cross for Australia in 2024 following a review by the Defence Honours and Awards Tribunal. The PAVN/VC appeared to be probing the Australians to gain information on their dispositions and these efforts continued the following day with the defenders observing two PAVN near the perimeter of FSB Coral, while patrols from 1 RAR later contacted small groups and uncovered a recently used company-sized camp just from the base. By 15 May, the Australians considered their defences to be properly co-ordinated, while nearby the PAVN 141st Regiment was again preparing to attack Coral after evading the intensive patrolling. Yet that night a large number of lights and flares were observed by the defenders, effectively warning them of the impending assault.
Second attack on FSB Coral, 16 May 1968 At 02:30 on 16 May the PAVN began a heavy barrage of RPGs and mortar fire, concentrating on A Company 1 RAR, 1 ATF headquarters, and the forward task force maintenance area. Now heavily reinforced, the Australian and American artillery and mortars quickly responded with heavy
counter-battery fire, with a total of 60 guns from three batteries of 105 mm field guns, one battery of 155 mm howitzers, one battery and nine 81 mm mortars firing in support, augmented by air support from three heavy fire teams (each of three
UH-1 helicopter gunships) and three fighter-bombers with bombs and
napalm. Regardless, at 02:40 the PAVN launched a battalion-sized attack, which initially fell on A and B Companies. Even with the artillery and mortars concentrating on close defensive fire tasks, the assault was largely held at the perimeter, although they did succeed in over-running part of 3 Platoon, A Company. Commanded by Lieutenant Neil Weekes, the platoon had been hit heavily by indirect fire during the initial bombardment and had suffered several casualties. Concentrating on the gap created in the Australian perimeter, the PAVN then assaulted with the support of 12.7 mm
DShK heavy machine-guns. Ordering his men to fix
bayonets, Weekes successfully reorganised the defences however, and called in close mortar fire to stabilise the position, resulting in heavy casualties among the assaulting force. He was later awarded the
Military Cross for his leadership. Unable to achieve a break-in, the PAVN then broadened their attack to include C Company, engaging three of the four Australian companies on the perimeter. Yet after successfully opening gaps in the wire, they failed to press home their attack. By 04:00 A Company was still heavily engaged and the Australians called in helicopter light-fire teams and AC-47 gunships, which dropped flares continuously from 04:30 to illuminate the battlefield. By 05:00 the main attack was halted and the PAVN began withdrawing, just as the Australians were beginning to run low on ammunition. During the lull A Company was resupplied by APC, while the Australians pushed an RCL team forward to provide additional support. At 05:15 the PAVN attacked again, targeting the boundary between A and C Companies on the northern edge of the perimeter, only to be repulsed by mortar fire. Later a two-battalion attack on A, B and C Companies was also turned back. The Australians then counter-attacked with elements of A Company supported by APCs, regaining the lost 3 Platoon section post. Finally, after a six-hour battle the PAVN broke contact at 06:30 and withdrew with their dead and wounded, fighting a series of rearguard actions to prevent follow-up. The Australians also began collecting their casualties for evacuation, while another resupply was completed with APCs. 1 RAR subsequently commenced a clearance of the area, with the four Australian rifle companies patrolling to a depth of , killing one PAVN soldier and capturing another. Five Australians had been killed and 19 wounded, while two US artillerymen were also wounded during the fighting. Only 34 PAVN bodies were counted on the perimeter at dawn, however intelligence later indicated that fewer than 100 of the 790 attacking troops had survived unwounded. Meanwhile, in an attempt to disrupt the PAVN withdrawal, Keldie led a troop of cavalry from Coral, engaging a PAVN battalion during a pursuit that lasted until 15:00. On 17 May, Westmoreland visited FSB Coral and congratulated the task force on its defence. Both Australian battalions continued to patrol with minor contacts, and during one such incident at least six PAVN were killed when a group of approximately 35 was engaged by artillery and armed helicopters after being observed by scouts from B Company, 3 RAR. During the week that followed Australian patrols clashed with groups of PAVN moving through AO Surfers, many of them from the PAVN 165th Regiment, which was believed to be withdrawing into
War Zone D. A Company, 3 RAR subsequently occupied a blocking position on the Suoi Ba Pho creek, ambushing PAVN moving northwards and directing mortar firing onto evasion routes, killing eight and capturing two. Elsewhere, C Company, 3 RAR located and destroyed base camps in the vicinity of FSB Coogee. Meanwhile, with the approval of MacDonald, Hughes departed on a long-planned leave to
Singapore on 18 May, and
Colonel Donald Dunstan, the task force second-in-command, took over as Commander 1 ATF on 20 May. A respected and experienced leader, he quickly took control amidst growing tension. At 01:00 on 22 May FSB Coral was again attacked, though not on the same scale as before, coming under a short but accurate mortar bombardment that was subsequently broken up artillery and mortar fire. In order to bolster his defences and provide an increased offensive capability, on 21 May Dunstan ordered the
Centurion tanks from
C Squadron, 1st Armoured Regiment to redeploy the from Nui Dat. Under the command of Major Peter Badman, the slow-moving armoured column departed on 22 May, traversing the difficult terrain that included several old, rusting
Bailey bridges, which threatened to collapse under the 50-tonne weight of the Centurions. Moving via the inland route under cover provided by an observation aircraft from 161st Reconnaissance Flight, they drove north on Route 2, then west on
Highway 1 to Long Binh where they staged overnight. Just north of
Blackhorse Base Camp the lead vehicle of the convoy hit a road mine, damaging a
dozer tank but resulting in no casualties. They finally arrived at FSB Coral at 02:30 on 23 May. Four tanks from 1 Troop were subsequently allocated to 1 RAR, while 2 Troop was allocated to 3 RAR. Two American
M42 40 mm Self-Propelled Anti-Aircraft Guns had also accompanied the tanks and further strengthened the Australian FSBs in a ground support role.
First attack on FSB Balmoral, 26 May 1968 With 3 RAR achieving limited results in AO Manly, MacDonald suggested that Dunstan establish the battalion in a new location east of Route 16 in order to locate and destroy the PAVN/VC bases suspected to be in the area. 3 RAR subsequently occupied FSB Balmoral in AO Newport, north of Coral, on 24 May in the hope of provoking another battle. Shelton was keen to avoid the mistakes that had been made during the earlier occupation of FSB Coral however, and he sent two companies forward on foot to occupy the new fire support base while the battalion tactical headquarters accompanied them in APCs. During the insertion there were contacts between the Australians and PAVN, with at least one PAVN soldier being killed. Yet with B and D Companies securing the landing zone, the remainder of 3 RAR was inserted by helicopter from FSB Coogee in the late afternoon. FSB Balmoral would be developed as a battalion defensive position only, and 161st Battery RNZA was subsequently flown to FSB Coral, in order to concentrate all of the artillery in that location from where they would be able to cover the whole of the new AO. Meanwhile, the PAVN had been caught by surprise and, with no time prepare an attack, they were unable to respond on the first evening. Regardless, 3 RAR worked quickly to establish their defensive position, digging in and laying wire and claymore mines. On 25 May, 3 RAR began local defensive and familiarisation patrols. Four Centurion tanks from 2 Troop, C Squadron were ordered to redeploy to FSB Balmoral to bolster the defences, escorted by two infantry platoons from B Company, 1 RAR under Captain Bob Hennessy. En route, the PAVN engaged the Australian infantry from a series of bunkers, pinning them down with machine-gun fire at close range. In response the Australian tanks moved forward, suppressing the bunkers with
canister rounds while the infantry was extracted. The Australians had struck the edge of a large, defended base camp estimated at company-size, however under orders to continue to Balmoral before nightfall, they broke contact. The column subsequently arrived at FSB Balmoral without further incident at 15:30 and B Company, 1 RAR then returned to FSB Coral by helicopter. At least two PAVN were killed in the encounter, while one Australian was wounded. Although a relatively minor action, the tanks had been decisive and the engagement was early proof of their effectiveness in co-operation with the infantry. Meanwhile, the PAVN commander was no longer able to tolerate the Australian encroachment into his base areas, and with FSB Balmoral located just away, he subsequently tasked the 165th Regiment, commanded by Phan Viet Dong, to attack Balmoral. That evening tracer rounds, shots and lights again alerted the defenders of an impending attack. At 03:45 on 26 May the PAVN began a heavy bombardment with mortar and rockets, accompanied by machine-gun and small-arms fire. Immediately following the barrage, Balmoral was subjected to a ground assault across the open ground from the north-east by a force of up to battalion strength, falling primarily on D Company, commanded by Major Peter Phillips. At the same time the PAVN conducted a feint on the southern perimeter opposite A Company—under Major Horrie Howard—using
Bangalore torpedoes to break through the wire, although the gap was not exploited. Two Centurions that had been sited directly on the main axis of assault but concealed during the day, rolled forward under the cover of darkness. Their machine-guns and canister rounds proved telling during the fighting; the main attack stalled as it reached the wire before being repelled with heavy casualties by the combined firepower of the Australian infantry and tanks. Meanwhile, as sporadic mortar, RPG and small-arms fire continued, to the south FSB Coral was also hit with suppressing fire from mortars, recoilless rifles and RPGs between 04:15 and 04:30, killing one Australian and wounding another. The defenders at Balmoral then directed fire from helicopter and AC-47 gunships onto likely assembly areas and mortar base plate locations. Around 05:00 the PAVN finally broke contact and withdrew, removing the majority of their casualties under covering fire as the Australian artillery fired on their escape routes. Clearing patrols from 3 RAR then swept the area at first light but found only six PAVN dead and a large quantity of weapons, ammunition and equipment. The Australians subsequently began the evacuation of their casualties, having lost a further three dead and 14 wounded.
Bunker clash and patrolling in AO Surfers, 26–27 May 1968 Dunstan subsequently directed the clearance of the bunker system that had been located the previous day, and a combined force of D Company, 1 RAR and 1 Troop C Squadron under the command of Major Tony Hammett was tasked with carrying out a reconnaissance-in-force. Departing at 06:00 on the morning of 26 May, at 12:27 the lead Australian infantry platoon was hit by small arms fire and RPGs from Coral, after having paused to direct an air strike by
Canberra bombers from
No. 2 Squadron RAAF onto a nearby bunker system. In what would become the first Australian combined infantry and tank assault since the
Bougainville campaign against the Japanese in the Second World War, the tanks were called forward and attacked the bunkers with anti-tank solid shot and machine-guns, while the infantry indicated targets with their
M79 grenade launchers. Moving forward two or three abreast, the Centurions crushed many of the bunkers with their tracks and engaged others at point-blank range with their main armament. Further bunkers were exposed when the foliage was cut away by canister rounds and the infantry followed the tanks using rifles and grenades, while assault pioneers provided support with a flame-thrower as artillery and mortar fire engaged targets further away. The bunkers were well constructed and camouflaged, while visibility was limited to just among the dense vegetation and consequently many were not located by the Australians until they were upon them. The bunkers were sited to be mutually supporting, and the PAVN defending them responded with a crossfire of
RPG-2s, although the heavy armour of the Centurions proved impervious and they remained undamaged. During a three-hour battle the Australians and PAVN fought each other from bunker to bunker. However, with aerial reconnaissance revealing that the bunker system was part of a much larger base area, and with the Australian force judged too small to deal with it, Bennett directed Hammett to retire by late afternoon. Amidst a heavy rain the Australians broke contact at 16:00 under the cover of artillery and mortar fire, and they moved quickly back to FSB Coral. Fourteen bunkers had been destroyed, while seven PAVN bodies were counted and quantities of weapons, ammunition and documents were also captured. Yet many more men were undoubtedly entombed in the bunkers after being crushed by the tanks, making a comprehensive body count impossible. Although it had been a fierce engagement the Australians suffered no casualties, a fact which was attributed to the effectiveness of the tanks, and further validated Dunstan's decision to call them forward from Nui Dat. Second Lieutenant John Salter was later awarded the Military Cross for his leadership during this and other actions. Over the following days 1 ATF continued patrolling, although these operations resulted in only small-scale contact with the PAVN. On 27 May an Australian OH-13 helicopter was damaged by ground fire during a reconnaissance flight outside AO Newport, and air strikes on the area exposed several bunkers which were likely to have been used by the PAVN as a headquarters; they were subsequently destroyed by artillery fire.
Second attack on FSB Balmoral, 28 May 1968 A second regimental-sized attack against 3 RAR at Balmoral was launched by the PAVN at 02:30 on 28 May, with a two-battalion assault preceded by 60 mm and 80 mm mortar fire from the south. Meanwhile, FSB Coral was also attacked by indirect fire from 02:45. Similar to the attack two nights before, it began with another feint from the south as PAVN
sappers blew up the wire in front of A Company, but was successfully broken up before it reached the wire by the Australian defenders with claymore mines and small-arms fire from their M60 machine-guns,
L1A1 Self Loading Rifles and
M16 assault rifles. The main assault began at 03:10 from the north-east, with the brunt again being borne by Phillips' D Company. The Australian infantrymen were once again supported by tanks firing canister shot and machine-guns, while artillery and mortars provided continuous close indirect fires, with the combined effect of this firepower stopping the PAVN on the wire before they could penetrate the position. Although the assault was well co-ordinated, the PAVN had lost the element of surprise, with the preparatory fire once more alerting the defenders. The assault was subsequently called off after 30 minutes, while at 03:40 a small probe developed from the east but quickly dissipated. Sporadic mortar and rocket fire continued to fall as helicopter light-fire teams and AC-47 gunships engaged the PAVN, directed by
forward air control aircraft. From 05:00 until first light artillery from FSB Coral provided continuous battlefield illumination to stymie PAVN attempts to clear their dead and wounded, and they finally withdrew by 05:30. At first light a clearing patrol from D Company, 3 RAR swept the area with tanks and APCs in support, killing and capturing some attackers who had been pinned down in old B-52 bomb craters to the north of Balmoral. The daylight revealed that the PAVN had once again been soundly defeated leaving 42 dead and seven prisoners, while Australian losses were one killed and eight wounded. Quantities of weapons, clothing, ammunition and equipment were also recovered by the Australians. Phillips was subsequently awarded the Military Cross for his leadership during the battle. Many of the PAVN dead were teenagers of 16 or 17 years, evidence that the North Vietnamese had begun drafting 15-year-old boys into its combat units; as had happened after the earlier fighting, their bodies were collected by a bulldozer and buried in a
mass grave. Later, a large number of shell scrapes were discovered to the north-east of Balmoral during an aerial reconnaissance by an OH-13 helicopter, and they were thought likely to have been used by the PAVN as an assembly area before being engaged by artillery firing defensive fire tasks early in the battle. The successful defence of Balmoral and the high ratio of PAVN killed had confirmed the judgement of MacDonald and Dunstan and validated the decision to adopt an aggressive defence with strong static positions and forceful patrolling. The failed assault proved to be the final attempt to remove 1 ATF from AO Surfers, and there were no further attacks by the PAVN against either Coral or Balmoral.
Operation Toan Thang I concludes, 28 May − 6 June 1968 The Australians continued to patrol aggressively, with further clashes occurring between companies from 1 RAR and 3 RAR, and the PAVN. On the morning of 30 May, C Company, 1 RAR under Major Ian Campbell had patrolled into a bunker system east of FSB Coral and was contacted by a large dug-in PAVN force. At 08:30 the lead platoon, 9 Platoon, came under fire and was pinned down by RPGs and 7.62 mm
RPD light machine-guns. Meanwhile, 7 Platoon moved to assist but was also pinned down, with one section suffering heavy casualties and losing an M60 machine-gun. Campbell struggled to establish a company defensive position, pushing 8 Platoon forward covered by armed helicopters and indirect fire. Yet with the two forces facing each other at only , the Australian artillery and mortars were rendered ineffective and Dunstan subsequently dispatched two tanks from Coral to reinforce them as heavy fighting developed. Supported by APCs, the Australian infantry and tanks then assaulted and cleared several bunkers, allowing the lead platoon to withdraw after three hours of fighting. Suffering one killed and seven wounded, C Company broke contact by 11:55, withdrawing as artillery, mortars and air strikes engaged the bunker system. Three days later C Company returned to the area to recover the lost machine-gun only to find the position as they had left it; strewn with dead bodies and caved-in bunkers with the battlefield having been abandoned by the PAVN, who had also withdrawn following the Australian assault. The tanks had destroyed at least eight bunkers, while PAVN casualties included 24 dead and a further eight believed killed. Another group of 13 had also been engaged in the open by artillery, and were also possibly killed. The PAVN then appeared to abandon AO Surfers to the Australians, and increasingly diverted their movement around Coral and Balmoral. Operation Toan Thang I continued for another six days regardless, and 1 ATF patrolled extensively into June. However, with contacts decreasing, on 1 June Weyand judged the Australian blocking operation to have been successful in limiting the offensive against Saigon, and directed US and ARVN units to relieve them. Meanwhile, Hughes returned from leave and visited Dunstan at FSB Coral to discuss the situation and the task force's redeployment to Phước Tuy. FSB Balmoral was subsequently declared closed on 5 June, with 3 RAR and its direct support battery returning to Nui Dat by air, while FSB Coral was also closed the following day. The operation finally concluded on 6 June, with 1 RAR returning to Nui Dat by CH-47 after handing over the area of operations to the US 1st Infantry Division, while the logistic, artillery and armoured elements returned by road convoy. Yet the approach of the wet season concerned Hughes, who believed it could hinder the movement of the Centurions and leave them stranded from base until the dry season. Nonetheless, the tanks departed FSB Coral on 5 June; travelling via Bearcat and Route 15, the road move went without incident and they returned to Nui Dat by 17:00 on 6 June. ==Aftermath==