Project DELTA was formed and headquartered in Nha Trang. Patterned after a joint Vietnamese and CIDG reconnaissance project controlled by U.S. Special Forces, codename, LEAPING LENA, Project DELTA was formed in October of 1964 to conduct the most hazardous and critical missions inside the country of South Vietnam. The organizational structure and make up of the teams was very similar to LEAPING LENA. However, unlike its predecessor, Project DELTA would prove to be one of the most successful Special Operations units in the Vietnam War. In June of 1965, 5th Special Forces Group (A), Detachment B-52 was activated to act as a controller and headquarters element for the newly formed Project DELTA and its clandestine operations.