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 Americans mainland of Japan. Studies of the mitochondrial component of Japanese American genes of haplogroup M12 shows a direct correlation of Japanese haplotypes with Tibetans. Other haplotypes that early descents of Japanese people were thought to be carried into include C-M8, which is another Y-chromosome haplotype. Also going back to the Jōmon, that gene is displayed in high frequencies in people of Japanese descent. The estimated percentage of this type of gene in Japanese Americans is about 34.7%. The highest frequencies occur in Okinawans and Hokkaidos. Overall, the genetic makeup of Japanese Americans show very mixed origins of genes, all due