US Navy SEALs: How It All Started? Navy SEALs Brief History (Part1)

Some of the earliest World War II predecessors of the SEALs were the Operational Swimmers of the Office of Strategic Services, or OSS. Many current Navy SEAL missions were first assigned to them.

Their training started in November 1943 at Camp Pendleton, moved to Catalina Island in January 1944, and finally moved to the warmer waters in the Bahamas in March 1944. Within the U.S. military, they pioneered flexible swim fins and facemasks, closed-circuit diving equipment, the use of swimmer submersibles, and combat swimming and limpet mine attacks.

Navy SEALs

In May 1944, GEN Donovan, the head of the OSS, divided the unit into groups. He loaned Group 1, under LT Choate, to ADM Nimitz, as a way to introduce the OSS into the Pacific Theater. They became part of UDT-10 in July 1944. Five OSS men participated in the very first UDT submarine operation with the USS BURRFISH in the Caroline Islands in August 1944.

Admiral Chester Nimitz's "Granite Plan" for central Pacific operations required an efficient amphibious force. Many of the targeted islands were coral atolls with reefs that acted as natural obstacles to landings. During early November 1943, SeaBees engaged in experimental underwater blasting work were assembled at Waipio Amphibious Operating Base on Oahu to begin training in underwater demolition.

On 23 November 1943, the U. S. Marine landing on Tarawa Atoll emphasized the need for hydrographic reconnaissance and underwater demolition of obstacles prior to any amphibious landing.

After Tarawa, 30 officers and 150 enlisted men were moved to Waimanalo Amphibious Training Base and became Underwater Demolition Teams (UDT) ONE and TWO.


Navy Seal in een Hummvee in Afghanistan "Photo Courtesy of U.S. Army" by SGT Horace Murray

Navy Seal in een Hummvee in Afghanistan "Photo Courtesy of U.S. Army" by SGT Horace Murray


Eventually, 34 UDT teams were established. Wearing swim suits, fins, and facemasks on combat operations, these "Naked Warriors" saw action across the Pacific in every major amphibious landing including: Eniwetok, Saipan, Guam, Tinian, Angaur, Ulithi, Pelilui, Leyte, Lingayen Gulf, Zambales, Iwo Jima, Okinawa, Labuan, Brunei Bay, and on 4 July 1945 at Balikpapan on Borneo which was the last UDT demolition operation of the war.

The rapid demobilization at the conclusion of the war reduced the number of active duty UDTs to two on each coast with a complement of 7 officers and 45 enlisted men each.

The Korean War began on 25 June 1950, when the North Korean army invaded South Korea. Beginning with a detachment of 11 personnel from UDT 3, UDT participation expanded to three teams with a combined strength of 300 men.

As part of the Special Operations Group, or SOG, UDTs successfully conducted demolition raids on railroad tunnels and bridges along the Korean coast.

 

Resources: Compiled from mainly sealchallenge.navy.mil and wikipedia.org/wiki/United_States_Navy_SEALs

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