US Naval forces had been introduced intermittently off the coast of Vietnam since March 1950 as "
show the flag" tours to reinforce the
Republic of Vietnam. In May 1964 three carrier task groups took up position at
Yankee Station in the
Gulf of Tonkin. Reconnaissance flights were conducted by these carriers, although no combat missions had started. The Soviets had assisted the Vietnamese in the construction of more sophisticated anti-aircraft installations. The Navy sought to bring
electronic warfare "
DeSoto missions" to identify these installations and sent the , leading to the
Tonkin Gulf Incident. The number of vessels dramatically increased, with the "yacht club" including destroyers and cruisers along the coast on the
gun line. After the 1973
cease-fire, the Fleet conducted mine countermeasure operations in the coastal waterways of
North Vietnam. Two years later, ships and aircraft of the Fleet evacuated thousands of US citizens and refugees from
South Vietnam and
Cambodia as those countries fell to opposing forces. The fleet departed in 1975. ==The nickname and logo==