Winnebago steamed to the assistance of the disabled MV Green Mountain State. The cutter rendezvoused with the flooding merchantman and removed her crew. Winnebagos crew managed to stop the flooding and got the merchantman under tow. The cutter then towed the merchantman to Midway Island. For this rescue the crew was awarded the Coast Guard Unit Commendation. On 26 December 1964 the British MV Southbank was tossed by a wave onto a reef off Washington Island in the South Pacific. On board were two women, 57 crewmen, and 49 Gilbertese laborers bound for Fanning Island, distant. Using lifeboats the shipwrecked crew and passengers escaped safely to the beach where the Washington Island natives cared for them until they were rescued by Winnebago. On 27 May 1965, Winnebago medevaced a disabled seaman from the Japanese FV Tsuru Maru No. 8 south of Honolulu. In May 1966, her medical officer, a U.S. Public Health Service officer, performed an appendectomy on a Winnebago crewmen. Winnebago then rendezvoused with where Winnebagos medical officer performed another appendectomy on a Navasota crewman. Later in the same month, Winnebago rendezvoused with the Japanese MV Shoei Maru where the doctor amputated the foot of a 17-year-old seaman. In May 1967, she medevaced an injured crewman from Shoeu Maru and transferred him to Texas Maru. Vietnam War Winnebago was assigned to Coast Guard Squadron Three, South Vietnam, from 20 September 1968 to 19 July 1969 as part of Operation Market Time. Her commanding officer during the deployment was CDR Bruce W. Dewing. While serving in Vietnamese waters, Winnebagos gun crews destroyed or damaged 42 enemy bunkers, two observation towers, and a large base and several staging areas. In addition, her gunners hit an enemy "infiltration trail and a complex of enemy tunneling that connected underground storage facilities", that also caused heavy secondary explosions and fires. The cutter "investigated more than 1,500 vessels for infiltrators and enemy arms shipments". Her medical staff also treated over 50 South Vietnamese "for a variety of ailments". She participated in four search-and-rescue operations as well, including rescuing "eight Vietnamese, 17 Greeks, and 35 Filipinos" who were rescued from their "sinking ships" during the cutter's deployment. Return to peacetime operations On 25 February 1970, Winnebago transferred a medical team to assist MV Sylvia Lykes near Midway Island. Eventually, Winnebago was stationed at Wilmington, North Carolina, from March 1972 to 27 February 1973 and used for