The National Navy UDT SEAL Museum - During World War II, segregation was practiced in the U.S. Military. There is evidence that Naval Combat Demolition Units (NCDUs) and Underwater Demolition Teams (UDTs)
Mini Times M003 USSOCOM Navy SEAL UDT: Underwater Demolition Team - Product Archive - Armed Figures
SEAL History: Underwater Demolition Teams in the Korean War - National Navy UDT-SEAL Museum