Third and fourth terms of the presidency of Franklin D. Roosevelt well-defended island of Iwo Jima, taking control of that island the following month. On April 1, the U.S. landed on Okinawa Island, the largest of the Ryukyu Islands. The Japanese allowed the Americans to land on the island before launching a fierce attack that included "kamikaze" suicide attacks by Japanese aircraft. Japanese forces on Okinawa held out until June 1945; U.S. forces suffered over 60,000 casualties during the operation. In late 1943, Roosevelt, Churchill, and Stalin agreed to meet to discuss strategy and post-war plans at the Tehran Conference, which marked Roosevelt's first face-to-face meeting with Stalin. At the conference,
History of Bougainville the 3rd Marine Division landed on the west coast of Bougainville. Shortly afterwards the Battle of Empress Augusta Bay was fought between cruisers and destroyers of the U.S. Navy and the Imperial Japanese Navy. The Americans routed the Japanese and took control of the seas in this area. A concerted Allied land offensive between November 1943 and April 1944 was needed to occupy and hold the part of the island along the western shore in an area called "Torokina". The Americans set about establishing a wide defensive perimeter, draining swamps, and building multiple airfields for defence. Their next goal was