Admiral Isoroku Nagumo was a prominent Japanese naval officer during World War II, best known for his role in the attack on Pearl Harbor in December 1941. He commanded the Kido Butai, the main striking force of the Imperial Japanese Navy, which included six aircraft carriers. His leadership during the early stages of the war contributed to Japan's initial successes in the Pacific. Nagumo's career was marked by both strategic brilliance and critical mistakes. After the attack on Pearl Harbor, he led the Japanese fleet in several key battles, including the Battle of Midway in June 1942, where his forces suffered a significant defeat. This loss marked a turning point in the war, leading to a decline in Japanese naval power.