John Spence, American soldier and engineer (born 1918)

John Pitts Spence was an American diver for the United States Navy and World War II veteran who is widely credited as the country's first combat frogman. Spence was the first enlisted man to be recruited into a clandestine group, operated by General William "Wild Bill" Donovan of the Office of Strategic Services (OSS), which would become known as the frogmen. The group was a predecessor of the present-day United States Navy SEALs.