"Operation Frequent Wind, the largest helicopter evacuation on record, begins removing the last Americans from Saigon. The North Vietnamese had launched their final offensive in March 1975 and the South Vietnamese forces had fallen back before their rapid advance, losing Quang Tri, Hue, Da Nang, Qui Nhon, Tuy Hoa, Nha Trang, and Xuan Loc in quick succession. With the North Vietnamese attacking the outskirts of Saigon, U.S. Ambassador Graham Martin ordered the commencement of Frequent Wind. In 19 hours, 81 helicopters carried more than 1,000 Americans and almost 6,000 Vietnamese to aircraft carriers offshore. Cpl. Charles McMahon, Jr. and Lance Cpl. Darwin Judge, USMC, were the last U.S. military personnel killed in action in Vietnam, when shrapnel from a North Vietnamese rocket struck them as they were guarding Tan Son Nhut Airbase during the evacuation. At 7:53 a.m. on April 30, the last helicopter lifted off the rook of the embassy and headed out to sea. Later that morning, North Vietnamese tanks crashed through the gates of the Presidential Palace. North Vietnamese Col. Bui Tin accepted the surrender from Gen. Duong Van Minh, who had taken over from Tran Van Huong (who only spent one day in power after President Nguyen Van Thieu fled). The Vietnam War was over." https://www.warhistoryonline.com/vi...copters-overboard-during-the-vietnam-war.html ... and more at the link. The results of abandoning allies in fits of whining and sniveling is never ennobling nor effective as a 'solution' to political hackery.
The U.S. should've kept its outright stated commitments of using massive air power to flatten the North Vietnamese forces if they attacked. They were fully exposed and hideously vulnerable. An all out air strike campaign making full use of all the B-52s available would probably have killed tens of thousands of North Vietnamese soldiers.
