The landings were timed to take place in conjunction with similar operations at
Nassau Bay, in New Guinea, and on
Woodlark and Kiriwina. After sailing from Guadalcanal on 29 June, the Allied landing force was hampered by rain and fog. The main ground combat element assigned to this force was Major General
John H. Hester's
43rd Infantry Division. The task force's approach was covered by
Catalinas flying night patrols through the Blanche Channel. In the pre-dawn hours (approximately 02:25) the American destroyers
USS Talbot and
USS Zane detached from the main force to land New Zealand-trained and led
Fijian and
Tongan commandos and Companies A and B of the American
169th Infantry Regiment on
Sasavele Island and
Baraulu Island. The islands were quickly secured, although
Zane, became grounded on a reef, remaining so until the afternoon. These islands were strategically important because they are located just off the coast of New Georgia and control the entrance to
Roviana Lagoon from the Blanche Channel. Admiral
Richmond K. Turner commanded the invasion fleet—consisting of four transports and two supply ships, screened by eight destroyers—from his flagship, the attack transport
McCawley. A small advanced party of two companies from the
172nd Infantry Regiment was sent ashore around Rendova Harbor guided by a British officer, Major Martin Clemens and Lieutenant Frederick Rhoades, a
Royal Australian Navy officer. Along with a small group of local police constables, they intended on linking up with an Australian
coastwatcher, Flight Lieutenant Dick Horton, who would assist them in establishing the beachhead prior to the main landing. Strong winds pushed the advanced party off course, and ultimately they did not make contact with Horton until the first wave was making its run to the shore. By 06:00, the 43rd Division had begun landing. The U.S. Marine Corps' official history describes the initial landing as "hurried", "[having] all the appearance of a
regatta rather than a coordinated landing" and "chaotic in the extreme"; nevertheless, troops from the 103rd Field Artillery Battalion, along with Marines from the 9th Defense Battalion and Seabees from the 24th Naval Construction Battalion secured the beach although they were hampered by sporadic sniper fire. The appearance of a Japanese
"Betty" bomber which circled the landing zone but did not attack also slowed progress. The Japanese defenders reported back to their commanders that "due to the tenacious interference by enemy fighter planes, a decisive blow could not be stuck against the enemy landing convoy" and that the landings were an "absolutely miraculous" and "speedy disembarkation of the enemy." Following the first echelon, the 43rd Division's assistant commander, Brigadier General
Leonard Wing, and Vice Admiral
William F. Halsey, in command of the operation to secure New Georgia, waded ashore under sniper fire after their boat became grounded about from the beach. The 2nd Battalion, 172nd Infantry Regiment established a defensive perimeter around the beachhead but experienced trouble digging-in because of the swampy ground. Eventually, they were forced to move their defensive lines to higher ground. As the invasion progressed American supplies crowded the beaches as infantry pushed the Japanese defenders inland. The 9th Marine Defense Battalion, in addition to skirmishing with Japanese forces, began securing and clearing their predefined artillery position objectives, and the Seabees from the 24th Naval Construction Battalion began clearing an encampment for a medical aid station. In response to the landing, Japanese artillery batteries based on Bangaa Island and around Munda then began shelling four US destroyers that were sailing through the Blanche Channel offshore from the landing beach. This shelling damaged the destroyer
Gwin, killing three and wounding seven, before two other ships from the screen—
Farenholt and
Buchanan—began engaging the shore batteries, while the damaged
Gwin obscured the transports with smoke to prevent them from being engaged. A force of 27
Zeros from the
11th Air Fleet undertook a fighter sweep over the beachhead just before noon, delaying the unloading of the US transports while Allied fighters engaged them, shooting down four. The assault, although initially chaotic, successfully landed 6,000 American troops on Rendova. The transports weighed anchor and began to depart the area around 15:00. Half an hour later, Japanese air attacks began in earnest when Admiral
Jinichi Kusaka ordered a strike by 25 Betty torpedo bombers, escorted by 24 Zeros. Despite being intercepted by 16
Corsairs from
Marine Fighter Squadron 221, and coming under heavy anti-aircraft fire, one of the Bettys was able to release a torpedo which struck
McCawley, killing 15 sailors and wounding eight others. While under tow from
Libra, the ship again came under attack from
Val dive bombers, which formed part of a larger air attack consisting of 21 Zeros, nine Vals and 13
F1M floatplanes. This attack was repulsed with no Allied losses, as the Japanese air attacks on the landing zone were successfully beaten off by American fighter planes as well as land and sea-based anti-aircraft defense guns. Allied aircraft began bombing Japanese positions around Villa and Munda, Air and naval losses on the first day are disputed. The Japanese claimed to have shot down 50 Allied aircraft, although the Allies reported only 21 planes lost. Additionally, the Japanese claimed to have sunk a cruiser and a destroyer, and damaging two more destroyers and eight transports; Allied reported shipping losses amounted to one destroyer damaged and one transport sunk. On the Allied side, they claimed to have shot down 106 Japanese planes, but Japanese figures support only 30 lost. ==Japanese counter-attacks==