On 12 April 1975, the
9th Marine Amphibious Brigade (9th MAB), which was to supply helicopters and a security force for the evacuation, sent a delegation to consult with Ambassador
Graham Martin on current plans. Ambassador Martin told them that he would not tolerate any outward signs that the United States intended to abandon South Vietnam. All planning would have to be conducted with the utmost discretion. Brigadier General
Richard E. Carey, commander of the 9th MAB, flew to Saigon the next day to see Ambassador Martin, he later said that ‘The visit was cold, non-productive and appeared to be an irritant to the Ambassador’. On 25 April, 40 marines from the 9th MAB on the were flown in by
Air America helicopters in civilian clothes to the
DAO Compound to augment the 18
Marine Security Guards assigned to defend the embassy, an additional 6 marines were assigned to protect Ambassador Martin. Ambassador Martin remained optimistic that a negotiated settlement could be reached whereby the United States would not have to pull out of South Vietnam and, in an effort to avert defeatism and panic he specifically instructed Major James Kean, commanding officer of the Marine Security Guard Battalion and ground support force commander United States Embassy Compound, that he could not begin to remove trees and shrubbery which prevented the use of the embassy parking lot as a helicopter
landing zone. On 28 April at 18:00
Tan Son Nhut Air Base was bombed by three
A-37 Dragonflies piloted by former
RVNAF pilots who had defected to the
Vietnamese People's Air Force at the fall of Da Nang. Sporadic
People's Army of Vietnam (PAVN) rocket and artillery attacks also started to hit the airport, increasing to 40 rounds per hour by 04:00 on 29 April. At 07:00, Major General
Homer D. Smith, the defense attache, advised Ambassador Martin that fixed wing evacuations should cease and that
Operation Frequent Wind, the helicopter evacuation of U.S. personnel and at-risk Vietnamese should commence. Ambassador Martin refused to accept General Smith's recommendation and instead insisted on visiting Tan Son Nhut to survey the situation for himself. Finally at 10:51 the order was given to commence Operation Frequent Wind, however due to confusion in the chain of command General Carey did not receive the execute order until 12:15. The two major evacuation points chosen for Operation Frequent Wind were the DAO Compound adjacent to Tan Son Nhut Airport for American civilian and Vietnamese evacuees and the embassy for embassy staff. By the morning of 29 April it was estimated that approximately 10,000 people had gathered around the embassy, while some 2,500 evacuees were in the embassy and consular compounds. From 10:00 to 12:00 Major Kean and his marines cut down trees and moved vehicles to create an LZ in the embassy parking lot behind the chancery building. Two LZs were now available in the embassy compound, the rooftop for
UH-1s and
CH-46 Sea Knights and the new parking lot LZ for the heavier
CH-53 Sea Stallions. Air America UH-1s began ferrying evacuees from other smaller assembly points throughout the city (including the
Pittman Building, famously photographed by
Hubert van Es) and dropping them on the embassy's rooftop LZ. At 15:00 the first CH-53s were sighted heading towards the DAO Compound at Tan Son Nhut. Major Kean contacted the
Seventh Fleet to advise them of his airlift requirements; until that time the fleet believed that all evacuees had been bussed from the embassy to the DAO Compound and that only two helicopters would be required to evacuate the Ambassador and the marines from the embassy. At 17:00 the first CH-46 landed at the embassy. Between 19:00 and 21:00 on 29 April approximately 130 additional marines from
2nd Battalion, 4th Marines were lifted from the DAO Compound to reinforce perimeter security at the embassy, bringing the total number of marines at the embassy to 175. The evacuation from the DAO Compound was completed by about 19:00, after which all helicopters would be routed to the embassy; however, Major Kean was informed that operations would cease at dark. Major Kean advised that the LZ would be well lit and had vehicles moved around the parking lot LZ with their engines running and headlights on to illuminate the LZ. At 21:30 a CH-53 pilot informed Major Kean that the Admiral Whitmire, Commander of
Task Force 76 had ordered that operations cease at 23:00. Major Kean saw Ambassador Martin to request that he contact the Oval Office to ensure that the airlift continued. Ambassador Martin soon sent word back to Major Kean that sorties would continue to be flown. At the same time, General Carey met with Admiral Whitmire to convince him to resume flights to the embassy despite pilot weariness and poor visibility caused by darkness, fires and bad weather. By 02:15 on 30 April, one CH-46 and one CH-53 were landing at the embassy every 10 minutes, with the embassy indicating that another 19 lifts would complete the evacuation. At the time, Major Kean estimated that there were still some 850 non-American evacuees and 225 Americans (including the marines), Ambassador Martin told Major Kean to do the best he could. At 03:00, Ambassador Martin ordered Major Kean to move all the remaining evacuees into the parking lot LZ which was the marines' final perimeter. At 03:27 President
Gerald Ford ordered that no more than 19 additional lifts be allowed to complete the evacuation. At 04:30 with the 19 lift limit already exceeded, Major Kean went to the rooftop LZ and spoke over a helicopter radio with General Carey who advised that President Ford had ordered that the airlift be limited to U.S. personnel and General Carey, Commanding General, 9th MAB, ordered Major Kean to withdraw his men into the chancery building and withdraw to the rooftop LZ for evacuation. Major Kean returned to the ground floor of the chancery and ordered his men to withdraw into a large semicircle at the main entrance to the chancery. Most of the marines were inside the chancery when the crowds outside the embassy broke through the gates into the compound. The marines closed and bolted the chancery door, the elevators were locked by
Seabees on the 6th floor and the marines withdrew up the stairwells locking grill gates behind them. On the ground floor a water tanker was driven through the chancery door, and the crowd began to surge up through the building toward the rooftop. The marines on the rooftop had sealed the doors to the rooftop and were using mace to discourage the crowd from trying to break through. Sporadic gunfire from around the embassy passed over the rooftop. At 04:58 Ambassador Martin boarded a USMC CH-46, call-sign "Lady Ace 09" of
HMM-165 and was flown to the . When Lady Ace 09 transmitted "Tiger is out", those helicopters still flying thought the mission was complete, thereby delaying the evacuation to the marines from the embassy rooftop. CH-46s evacuated the Battalion Landing Team by 07:00, and after an anxious wait a lone CH-46 "Swift 2-2" of
HMM-164 arrived to evacuate Major Kean and the ten remaining men of the Marine Security Guards; this last helicopter took off at 07:53 on 30 April and landed on at 09:30. At 11:30
PAVN tanks smashed through the gates of the presidential palace (now the
Reunification Palace) and raised the
Viet Cong flag over the building; the Vietnam War was over. Marine pilots accumulated 1,054 flight hours and flew 682 sorties throughout Operation Frequent Wind, evacuating 5,000 from Tan Son Nhut and 978 U.S. and 1,120 Vietnamese and third-country nationals from the embassy. Some 400 evacuees were left behind at the embassy, including over 100 South Korean citizens.
Lady Ace 09, CH-46 serial number 154803 is now on display at the
Flying Leatherneck Aviation Museum in San Diego, California. ==Post-war period to present==