UDT 21

• Origins in WWII: UDT 21 was one of the original Underwater Demolition Teams (UDTs) formed by the U.S. Navy during World War II, with roots tracing back to 1944. • D-Day Operations: UDT 21 participated in the Normandy landings (D-Day), conducting reconnaissance and clearing obstacles for the Allied invasion forces. • Pioneer in Combat Swimming: Members of UDT 21 were among the first U.S. military personnel trained in combat swimming, working in hazardous surf zones under enemy fire. • Pacific Theater Actions: The team played a crucial role in clearing beaches in the Pacific, enabling successful amphibious assaults on Japanese-held islands. • Innovation in Demolition Techniques: UDT 21 helped develop and refine underwater demolition and explosive placement techniques, setting the stage for modern naval special warfare. • Postwar Influence: After WWII, UDT 21 contributed to training and doctrine that would lead to the formation of the U.S. Navy SEALs in 1962. • Spearheaded Cold Water Operations: UDT 21 was among the first teams to conduct operations in cold water, testing equipment and human limits for future missions in diverse environments. • Clandestine Reconnaissance: The unit specialized in secret intelligence-gathering, often operating behind enemy lines to scout landing sites and gather critical information. • Distinguished Alumni: Several UDT 21 veterans went on to become prominent leaders in the Navy SEAL community, influencing special operations tactics for decades. • Legacy in Naval Special Warfare: UDT 21’s legacy is honored in the ethos and traditions of today’s Navy SEALs, who trace their lineage directly to the pioneering work of the UDTs.