Today, 80 years ago, on July 30, 1945 (Calendar June 22, 1945), the U.S. Navy¡¯s Indianapolis was sunk by a Japanese submarine in the Philippine Sea. On July 30, 1945, the U.S. Navy¡¯s Indianapolis heavy cruiser was sunk by the Japanese submarine I-58 in the Philippine Sea. 300 of the 1,200 soldiers on board were killed on the ground, and the remaining about 900 sailors were discovered by the U.S. Navy¡¯s patrol aircraft four days later, and only 317 survived. The cruiser was launched from San Francisco on July 16 and secretly carried the nuclear weapons of Japan¡¯s core materials to Nitian Island. After dispatching the ship to Guam on the island of Tianjin, the submarine was attacked on the way to