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,
30th Division (Imperial Japanese Army) retreat to the Waloe (in now Agusan Marsh Wildlife Sanctuary), but US troops have reached Waloe first, resulting in Japanese retreating to the west after a skirmish 27 June 1945. The scattered Japanese forces have largely survived in the mountains of the Central Mindanao until surrender of Japan 15 August 1945. Some detachments (approximately battalion-sized) of the "30th division" guarding airfields of Sarangani Bay on the far south of the island were eliminated in July 1945. Allentown, PA: 1981 30th Division (Imperial Japanese Army) The was an infantry division in the Imperial Japanese Army. Its call sign was the .