"When the Japanese attacked Pearl Harbor on 7 December 1941, the U.S. Navy had a total of 111 submarines. However, this fleet was not nearly as impressive as the number suggests. It was mostly a collection of aging boats from the late teens and early twenties, with only a few of the newer, more modern Gato-class boats. Fortunately, with the war in Europe was already two years old and friction with Japan ever-increasing, help from what would become...