Isoroku Yamamoto (1884-04-04 1943-04-18) was a Fleet Admiral and Commander-in-Chief of the Imperial Japanese Navy (IJN) during World War II. He was a graduate of the Imperial Japanese Naval Academy and an alumnus of the U.S. Naval War College and Harvard University. He died during an inspection tour of forward positions in the Solomon Islands when his transport aircraft was ambushed by American P-38 Lightning fighter planes. His death was a major blow to Japanese military morale during World War II.