America's Hidden Heroes: The History and Evolution of U.S. Navy Frogmen and Seals, Paperback

Noted SEAL historian and retired Navy SEAL Commander Tom Hawkins recounts how today's Navy SEALs can trace their capabilities and origins back to four formidable legacy units formed during World War II. For the first time in one volume are the stories of the Amphibious Scouts and Raiders (S&R), Naval Combat Demolition Units (NCDUs), Underwater Demolition Teams (UDTs) and the Office of Strategic Services Maritime Unit (OSS MU).