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,
Japanese in Chicago the war, the number of ethnic Japanese increased to 20,000. Unlike on the west coast, the Japanese had freedom of movement and could work. Japanese worked in factories making materials to support the war, including aircraft and electronics. The Japanese Americans in Chicago largely relied on each other and avoided support from civic organizations, church organizations, and the WRA. Charlotte Brooks, author of "In the Twilight Zone between Black and White: Japanese American Resettlement and Community in Chicago, 1942-1945," wrote that Chicagoans did not perceive the Japanese-Americans as being "Japanese", but rather as non-White, and being "Orientals" but not black.