Charles A. Lockwood was a highly decorated Vice Admiral in the United States Navy, renowned for his command of the Pacific Fleet's submarine force during World War II. Taking command after the Pearl Harbor attack, he revolutionized American submarine warfare with aggressive tactics and crucial technological improvements, such as fixing faulty torpedoes. His leadership was instrumental in the devastatingly effective submarine campaign against Japanese merchant shipping, which crippled their war effort. After the war, he authored several books about his experiences and is remembered as one of the most important figures in submarine history.