Admiral William Halsey Jr. was a prominent United States Navy officer during World War II. Born on October 30, 1882, he played a crucial role in several key battles in the Pacific Theater, including the Battle of Midway and the Battle of Leyte Gulf. Halsey was known for his aggressive tactics and leadership style, which earned him the nickname "Bull Halsey." Halsey commanded the Third Fleet and was instrumental in the naval strategies that contributed to the defeat of the Japanese Navy. After the war, he continued to serve in various capacities, including as the commander of the United States Atlantic Fleet, until his retirement in 1947.