page_title: Battle of Tulagi and Gavutu–Tanambogo
section_title: Gavutu–Tanambogo
hierarchical_section_title: Battle of Tulagi and Gavutu–Tanambogo / Battle / Gavutu–Tanambogo
caption_attribution_description: English: Map in German language depicting the allied landings on Gavutu and Tanambogo (7 / 8 August 1942) during the Pacific War. It is based mainly on a contemporary military sketch as well as on aerial reconnaissance photos from May/June 1942.
context_page_description: The Battle of Tulagi and Gavutu–Tanambogo was a land battle of the Pacific campaign of World War II, between the forces of the Imperial Japanese Navy and Allied ground forces. It took place from 7–9 August 1942 on the Solomon Islands, during the initial Allied landings in the Guadalcanal campaign.
  U.S. Marines of the 1st Marine Division, under the overall command of U.S. Major General Alexander Vandegrift, with the USMC invasion force under the direct command of Brigadier General William Rupertus, captured the islands of Tulagi, Gavutu, and Tanambogo among which the Japanese Navy had constructed a naval and seaplane base. The landings were fiercely resisted by the Japanese Navy troops who, heavily outnumbered and outgunned by the Allied forces, fought and died almost to the last man.
  While the landings on Tulagi and Gavutu–Tanambogo were taking place, Allied troops were also landing on nearby Guadalcanal, with the objective of capturing an airfield under construction by Japanese forces. In contrast to the intense fighting on Tulagi and Gavutu, the landings on Guadalcanal were essentially unopposed.
context_section_description: The nearby islets of Gavutu and Tanambogo housed the Japanese seaplane base as well as 536 Japanese naval personnel from the Yokohama Air Group and 3rd Kure Special Naval Landing Force and Korean and Japanese civilian technicians and laborers from the 14th Construction Unit. The two islets were basically mounds of coral—both about 42 m (138 ft) high—and connected to each other by a 500 m (1,600 ft)-long causeway. The hills on Gavutu and Tanambogo were called Hills 148 and 121 respectively by the Americans because of their height in feet. The Japanese on both islets were well entrenched in bunkers and caves constructed on and in the two hills. Also, the two islets were mutually supportive since each was in machine gun range of the other. The U.S. mistakenly believed the islets were garrisoned by only 200 naval troops and construction workers.
  At 12:00 on 7 August, Gavutu was assaulted by the U.S. Marine 1st Parachute Battalion consisting of 397 men. The assault was scheduled for noon because there were not enough aircraft to provide air cover for the Guadalcanal, Tulagi, and Gavutu landings at the same time. The preceding naval bombardment had damaged the seaplane ramp, forcing the naval landing craft to land the Marines in a more exposed location on a nearby small beach and dock at 9°6′53.30″S 160°11′19.20″E. Japanese machine gun fire began inflicting heavy casualties, killing or wounding one in ten of the landing Marines as they scrambled inland in an attempt to get out of the crossfire coming from the two islets.
  Surviving Marines were able to deploy two M1919 Browning machine guns to provide suppressing fire on Gavutu's caves, allowing more Marines to push inland from the landing area. Seeking cover, the Marines became scattered and were quickly pinned down. Captain George Stallings—the battalion operations officer—directed Marines to begin suppressive fire with machine guns and mortars on the Japanese machine gun emplacements on Tanambogo. Shortly thereafter, American dive bombers dropped several bombs on Tanambogo, diminishing some of the volume of fire from that location.
  After about two hours, Marines reached and climbed Hill 148. Working from the top, the Marines began clearing the Japanese fighting positions on the hill, most of which still remained, with explosive charges, grenades, and hand-to-hand combat. From the top of the hill, the Marines were also able to put increased suppressive fire on Tanambogo. The Marine battalion commander on Gavutu radioed General Rupertus with a request for reinforcements before attempting to assault Tanambogo.
  Most of the 240 Japanese defenders on Tanambogo were aircrew and maintenance personnel from the Yokohama Air Group. Many of these were aircraft maintenance personnel and construction units not equipped for combat. One of the few Japanese soldiers captured recounts fighting armed with only hand sickles and poles. Rupertus detached one company of Marines from the 1st Battalion, 2nd Marine Regiment on Florida Island to assist in assaulting Tanambogo, in spite of advice from his staff that one company was not enough. Incorrectly believing Tanambogo to be only lightly defended, this company attempted an amphibious assault directly on Tanambogo shortly after dark on 7 August. Illuminated by fires started during a U.S. naval bombardment of the islet, the five landing craft carrying the Marines were hit by heavy fire as they approached the shore, with many of the U.S. Navy boatcrews being killed or wounded, as well as heavily damaging three of the boats. Realizing the position was untenable the Marine company commander ordered the remaining boats to depart with the wounded marines, and he and 12 men who had already landed sprinted across the causeway to cover on Gavutu. The Japanese on Tanambogo suffered 10 killed in the day's fighting.
  Throughout the night, as the Japanese staged isolated attacks on the marines on Gavutu under the concealment of heavy thunderstorms, Vandegrift prepared to send reinforcements to assist with the assault on Tanambogo. The 3rd Battalion 2nd Marines 
caption: Landings on Gavutu and Tanambogo
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