Operation Venice At 14:00 on 26 May, X Corps and XXI Corps attacked on the central Gazala positions, after an artillery concentration, beginning (Operation Venice). A few elements of the and XX Mobile Corps were attached to these assault groups. During the day, the bulk of the (DAK) moved, to give the impression that this was the main Axis assault. When night fell, the armoured formations turned south in a sweeping move around the southern end of the Gazala line. In the early hours of 27 May, Rommel led the elements of , DAK, XX Motorised Corps and the German 90th Light Division, in a bold flanking move around the southern end of the Allied line, using the Allied minefields to protect the Axis flank and rear. The "Ariete" Division was held up for about an hour by the
3rd Indian Motor Brigade of the 7th Armoured Division, dug in about south east of Bir Hakeim at
Rugbet el Atasc. The
132nd Tank Infantry Regiment of the "Ariete" Division sent its experienced VIII and IX Medium Tank battalions forward, while the fresh X Medium Tank Battalion was in support. The Indian position was overrun with the loss of some of which were repairable on the field, killed and , while the Indians lost killed and wounded and about including Admiral Sir
Walter Cowan and most of its equipment. The 21st Panzer Division was advancing south of the position and did not take part in the action. Further to the east, the 15th Panzer Division had engaged the 4th Armoured Brigade of the 7th Armoured Division, which had been ordered south to support the 3rd Indian and 7th Motorised brigades. In a mutually costly engagement, the Germans were surprised by the range and power of the guns on the new M3 (Grant) tanks. The 4th Armoured Brigade then withdrew toward El Adem and spent the night near the Belhamed supply base, east of El Adem. By late morning, the Axis armoured units had advanced more than north but by noon had been stopped by the
1st Armoured Division in more mutually-costly fighting. On the far right of the Axis advance, the 90th Light Division engaged the 7th Motorised Brigade at Retma and forced it to withdraw eastwards on Bir el Gubi. Resuming their advance toward El Adem before noon, armoured cars of the 90th Light came upon the advanced HQ of 7th Armoured Division near Bir Beuid, dispersing it and capturing a number of officers, including the commander,
Frank Messervy, who pretended to be a
batman and escaped. The "inexcusable" lapse in security left the division without effective command for the next two days. As planned, the 90th Light Division reached the El Adem area by mid-morning and captured a number of supply dumps. The following day, the 4th Armoured Brigade was sent to El Adem and the 90th Light Division was driven back to the south-west. The tank battle continued for three days; lacking possession of Bir Hakeim, Rommel drew the DAK into a defensive position, using the extensive Allied mine belts to block an Allied approach from the west. The British tanks attacked several times from the north and east against accurate defensive fire. The Axis supply situation became desperate; defending the German rear, the "Ariete" Division repulsed attacks by the British armoured brigades on 29 May and during the first week of June.
Bir Hakeim The Bir Hakeim box was defended by the 1st Free French Brigade under
Marie-Pierre Kœnig. On 27 May, the Italian IX Tank Battalion of the 132nd Tank Infantry Regiment (Ariete Division), which had not been engaged in the destruction of the 3rd Indian Brigade box and had continued to advance alone at full speed, stumbled in the French positions and launched a hasty attack, which was a costly failure against the French guns and mines. On the night of the 90th Light and Trieste divisions were sent south to renew the attack on Bir Hakeim, where the battle continued for another ten days. Reinforced with a further , the Axis attacked Bir Hakeim again on 9 June and overran the defences by the following day. Ritchie ordered the remaining troops to evacuate as best they could, under the cover of darkness. Under fire through the night, many of the French were able to find gaps in the line through which to withdraw. The survivors then made their way some to the west, to rendezvous with transport from the 7th Motor Brigade. About (including of the original garrison of and about troops, many of whom were wounded, were captured when the 90th Light Division occupied the position on 11 June.
The Cauldron Early on 29 May, supply vehicles supported by the Trieste and Ariete divisions, worked through the minefield north of Bir Hakeim and reached the . On 30 May, Rommel pulled the back westward against the edge of the minefields, creating a defensive position. A link was formed with elements of the Italian X Corps, which were clearing two routes through the minefields from the west. In the process, the Sidi Muftah box was overrun and the defending
150th Infantry Brigade was destroyed after brutal fighting. At one point, Rommel personally led a platoon of panzer grenadiers in the attack; Acting on mistaken reports about German tank losses, Auchinleck strongly urged Ritchie to counter-attack along the coast, to exploit the absence of German tanks and break through to Timimi and then
Mechili. Ritchie was more concerned by Tobruk, brought reinforcements up to the El Adem box and created new defensive boxes opposite the gaps in the minefield. Ritchie ordered the Eighth Army to counter-attack against the on 5 June but they were met by accurate fire from tank and anti-tank guns positioned in the cauldron. In the north, XIII Corps made no progress but the attack by 7th Armoured and 5th Indian divisions on the eastern flank of the cauldron at 02:50 initially went well. An important element of the plan was the destruction of the Axis anti-tank screen with an artillery bombardment but because of an error in plotting its position, the bombardment fell too far to the east. When the 22nd Armoured Brigade advanced, it was met by massed anti-tank fire and checked. The 32nd Army Tank Brigade, advancing from the north, joined the attack at dawn but also ran into massed fire, losing fifty of seventy tanks. By early afternoon on 5 June, Rommel split his forces, deciding to attack east with the and 21st Panzer divisions while he sent elements of 15th Panzer Division northwards against the Knightsbridge Box. The eastward thrust towards Bir el Hatmat dispersed the tactical HQs of the two British divisions, as well as the HQs of the
9th Indian Infantry Brigade, the
10th Indian Infantry Brigade and other smaller units, which caused command to break down. The 22nd Armoured Brigade, having lost its was forced from the battlefield by more attacks from the 15th Panzer Division. Three Indian infantry battalions, a reconnaissance regiment and four artillery regiments of the attacking force were left behind, unsupported by armour and overrun. Rommel retained the initiative, maintaining his strength in the cauldron while the number of operational British tanks diminished. A number of probes were sent to test the various opposing strong points and from 6 to 8 June, further attacks were launched on Bir Hakeim and repulsed by the French garrison. The 7th Motor Brigade and
29th Indian Infantry Brigade continued to harass the Axis lines of communications.
Knightsbridge, 10 June Orders for the 4th Armoured Brigade were to occupy Hill 176, west of Trigh Bir Hakeim, then attack the
Ariete and force it to withdraw. The 2nd Armoured Brigade was to carry out a demonstration in support of the 4th Armoured Brigade. At 05:45 on 10 June, C Squadron, equipped with M3 Grant tanks, of the Queen's Bays left the bivouac between Rigel Ridge to the north and Trigh Capuzzo to the south, heading towards the
Ariete positions. At 07:00 C Squadron of the Queen's Bays came into contact with the tank units of the
Ariete, which sustained the shock and at about 08:00 forced the British to withdraw. On the start line the 6th RTR was on the right, with C Squadron on the left, B Squadron on the right and A Squadron ready to intervene on both flanks. The 1st RTR was deployed on the left with A Squadron in the lead (intended to cover the left flank of the regiment), followed by C Squadron, the command, B Squadron and a battery of the 1st RHA. At 08:40 the 6th RTR, preceded by a two-hour artillery preparation and covered by smoke bombs, invested the 2nd Company/VIII Battalion of the 132nd Infantry Tank Regiment. The formation saw the Grants in the centre and the Stuarts on the wings but their M13s and the self-propelled guns managed to prevent the envelopment and forced the British to march along the front, exposing the flanks of their tanks to Italian fire. At 09:00, finding itself under fire from anti-tank guns as well as tanks, C Squadron, 6th RTR closed in on the Italian tanks, managing to hit an Italian vehicle. The pressure on the Italian tanks managed to push them to within about of the anti-tank defence line, which then found it difficult to lay its anti-tank guns as they were masked by the Italian tanks. The 88/55 gun, after having adjusted its fire, at 09:40 destroyed two British tanks and stopped a third, then C Squadron began its retreat, followed after ten minutes by the rest of the 6th RTR while the anti-tank gun was countered by counter-battery fire from the RHA. At 11:00 a patrol of the 6th RTR, sent ahead to check the situation on the battlefield, was repulsed by artillery fire and at 11:30, another attack was made and was repulsed by concentrated fire from the Italian defences. At 14:00 the Queen's Bays were ordered to intervene to support the struggling 4th Armoured Brigade and having reached the position where the retreating regiments had stopped, exchanged positions with those of the 1st RTR, without there being any further clashes with the Italians.
Black Saturday, 13 June On 11 June, Rommel pushed the 15th Panzer Division and 90th Light Division toward El Adem and by 12 June had begun forcing the 201st Guards Brigade out of the Knightsbridge Box. The 29th Indian Infantry Brigade repulsed an attack on the El Adem box on 12 June but the 2nd and 4th Armoured brigades on their left were pushed back by the 15th Panzer Division and left their damaged tanks on the battlefield. On 13 June, the 21st Panzer Division advanced against the 22nd Armoured Brigade. The had combined tanks with anti-tank guns; Rommel had acted rapidly on intelligence obtained from Allied radio intercepts. By the end of the day, the British tank strength had been reduced from to about seventy; the had established armour superiority and a dominating line of positions, making XIII Corps on the Gazala line vulnerable to being cut off. By the end of 13 June, the Knightsbridge box was virtually surrounded and was abandoned by the Guards Brigade later that night, their commanding officer
Thomas Bevan having been killed the previous day. Due to these failures, 13 June became known as "Black Saturday" to the Eighth Army.
Rigel Ridge On 13 June, the 21st Panzer Division attacked Rigel Ridge in the middle of a sandstorm. The Germans overran part of the 2nd Scots Guards at the Knightsbridge Box at the west end of Rigel Ridge, overlooked by the 6th South African Anti-tank battery of the 2nd Field Regiment,
Natal Field Artillery and a battery of the
11th (HAC) Regiment RHA nearby. The South African gunners kept firing until their guns were destroyed, allowing the withdrawal of other Allied formations. The South African battery commander had decided to stay and maintain fire against the German tanks, to delay the Germans for as long as possible. The remaining guns were commanded individually and fired at the Panzers over open sights. The German tanks took up positions behind the ridge, with anti-tank guns placed between them. A column of Panzers attacked from the rear, surrounding them and cutting off all escape and the gunners kept firing until the eight guns had been destroyed. About half the gun detachments were killed and wounded, including the battery commander and many officers. The last gun in action was manned by Lieutenant Ashley and a signaller; when the battery had been silenced, the Axis tanks approached cautiously and the South African gunners were taken prisoner.
Eighth Army retreat On 14 June, Auchinleck authorised Ritchie to withdraw from the Gazala Line. The defenders in the El Adem and two neighbouring boxes held on and the 1st South African Division was able to withdraw along the coast road, practically intact. The road could not accommodate two divisions and the remaining two brigades of the 50th (Northumbrian) Division could not retreat eastwards because of the Axis tanks and attacked south-west, breaking through the lines of the
27th Infantry Division "Brescia" and
17th Infantry Division "Pavia" of X Corps; then headed south into the desert, before turning east. London would not contemplate a withdrawal to the better defensive positions on the Egypt–Libya frontier and on 14 June, Auchinleck ordered to Ritchie to hold a line running south-east from Acroma (west of Tobruk) through El Adem to Bir El Gubi. By the evening of 15 June, the defensive box at Point 650 had been overrun and on 16 June, the defenders at Point 187 had been forced by lack of supplies to evacuate. The defensive boxes at El Adem and Sidi Rezegh were also attacked by the . On 17 June, both boxes were evacuated, ending any chance of preventing the encirclement of Tobruk. Ritchie ordered the Eighth Army to withdraw to Mersa Matruh, about east of the frontier, leaving Tobruk to threaten the Axis lines of communication as in 1941. The retreat became known to some as the Gazala Gallop.
Fall of Tobruk In February 1942, the army, navy and air force commanders-in-chief in Cairo had agreed that Tobruk should not stand another siege. Auchinleck viewed the defence of Tobruk as a lesser matter and told Ritchie that he did not intend to hold it at all costs. An immense store of supplies of every description had been accumulated around the port for an Allied offensive and Auchinleck expected it to be able to hold out for two months with the supplies in the fortress. The defences at Tobruk had not been maintained and it was garrisoned by inexperienced troops. Gott garrisoned Tobruk with the two brigades of 2nd South African Division (Major-General
Hendrik Klopper) along with the
201st Guards (Motorised) Brigade,
11th Indian Infantry Brigade,
32nd Army Tank Brigade and the
4th Anti-Aircraft Brigade. Operation Venice () began on 26 May 1942 and drove the Eighth Army east of Tobruk, leaving it vulnerable to attack from the east. The
British prime minister Winston Churchill had placed great store on the symbolic value of Tobruk and there was an exchange of ambiguous signals, leading to the port becoming surrounded and besieged, rather than evacuated as originally planned. penetrated a weak spot on the eastern defensive perimeter and took the port within twenty-four hours. The garrison of 33,000 men was captured, many of those on the western perimeter not having been engaged. Over 1,000 vehicles in working order, of food and of petrol were captured. The surrender was the largest capitulation of British Empire forces in the war after the
Battle of Singapore in February 1942. Later in the year, a Court of Inquiry () found Klopper to be largely blameless for the surrender and ascribed the defeat to failures among the British high command. The findings were kept secret until after the war, doing little to restore the reputation of Klopper and his troops. ==Aftermath==