Operation Overlord Operation Torch Battle of Kwajalein Battle of Roi Namur Battle of Saipan Battle of Tinian Battle of Guam Battle of Peleliu Battle of Iwo Jima Battle of Okinawa Borneo campaign Battle of Leyte Invasion of Lingayen Gulf Operation Beleaguer Korean War Vietnam War
Military unit
The Underwater Demolition Team (UDT), or frogmen, were amphibious units created by the United States Navy during World War II with specialized missions. They were predecessors of the navy's current SEAL teams.
Their primary WWII function began with reconnaissance and underwater demolition of natural or man-made obstacles obstructing amphibious landings. Postwar they transitioned to scuba gear changing their capabilities. With that they came to be considered more elite and tactical during the Korean and Vietnam Wars. UDTs were pioneers in underwater demolition, closed-circuit diving, combat swimming, riverine warfare and midget submarine (dry and wet submersible) operations. They later were tasked with ensuring recovery of space capsules and astronauts after splash down in the Mercury, Gemini and Apollo space flight programs.[1] Commando training was added making them the forerunner to the United States Navy SEAL program that exists today.[2]
By 1983, the UDTs were re-designated as SEAL Teams or Swimmer Delivery Vehicle Teams (SDVTs); however, some UDTs, had already been re-designated into special boat units prior. SDVTs have since been re-designated SEAL Delivery Vehicle Teams.[3]
^"SEAL History: Before the First Mercury Splashdown | National Navy UDT-SEAL Museum". Navysealmuseum.com. Archived from the original on 21 January 2015. Retrieved 12 May 2014.
^Cunningham, Chet (2004). The Frogmen of World War II: An Oral History of the U.S. Navy's Underwater Demolition Teams. Pocket Star. ISBN 978-0-7434-8216-5.
^"Navy SEAL History". Retrieved 25 January 2008.
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