:
All times given are Saigon time. PAVN's encirclement At the Phước Tuy front, the PAVN
3rd Division (Sao Vàng) opened fire around 6:00 PM on 26 April. The PAVN tanks penetrated
Bà Rịa, but the infantry was unable to keep up, allowing the 1st Airborne Brigade to counterattack and drive them back. However, the PAVN pressure forced General Hinh to withdraw his forces to the other side of the . Hinh ordered the destruction of the bridge, which the airborne accomplished on the afternoon of 27 April. The two airborne battalions trapped on the Bà Rịa side had to cross the marshy salt flats to reach the other bank. The blocking of Route 15 at Bà Rịa forced the DAO to abandon its large-scale evacuation plan via
Vũng Tàu. On 27 April, Saigon was hit by PAVN rockets—the first in more than 40 months. With his overtures to the North rebuffed out of hand, Hương resigned on 28 April and was succeeded by General
Dương Văn Minh. Minh took over a regime that was by this time in a state of utter collapse. He had longstanding ties with the Communists, and it was hoped he could negotiate a ceasefire; however, Hanoi was in no mood to negotiate. On 28 April, PAVN forces fought their way into the outskirts of the city. At the
Newport Bridge (), about five kilometres (three miles) from the city centre, the VC seized the
Thảo Điền area at the eastern end of the bridge and attempted to seize the bridge but were repulsed by the ARVN 12th Airborne Battalion. As Bien Hoa was falling, Toàn fled to Saigon, informing the government that most of the top ARVN leadership had virtually resigned themselves to defeat. At 18:06 on 28 April, as Minh finished his acceptance speech three
A-37 Dragonflies piloted by former
Republic of Vietnam Air Force (RVNAF) pilots, who had defected to the
Vietnamese People's Air Force at the fall of Da Nang, dropped six
Mk81 250 lb bombs on
Tan Son Nhut Air Base damaging aircraft. RVNAF
F-5s took off in pursuit, but they were unable to intercept the A-37s.
C-130s leaving Tan Son Nhut reported receiving PAVN
.50 cal and 37 mm anti-aircraft (AAA) fire while sporadic PAVN rocket and artillery attacks also started to hit the airport and air base. At 03:58 on 29 April, C-130E, #72-1297, flown by a crew from the
776th Tactical Airlift Squadron, was destroyed by a 122 mm rocket while taxiing to pick up refugees after offloading a
BLU-82 at the base. The crew evacuated the burning aircraft on the taxiway and departed the airfield on another C-130 that had previously landed.
Operation Frequent Wind provides security as American helicopters land at the DAO compound The continuing rocket fire and debris on the runways at Tan Son Nhut caused General
Homer D. Smith, the U.S. defense attaché in Saigon, to advise Martin that the runways were unfit for use and that the emergency evacuation of Saigon would need to be completed by helicopter. Originally, Martin had intended to effect the evacuation by use of fixed-wing aircraft from the base. This plan was altered at a critical time when a South Vietnamese pilot decided to defect, and jettisoned his ordnance along the only runways still in use (which had not yet been destroyed by shelling). Under pressure from Kissinger, Martin forced Marine guards to take him to Tan Son Nhut in the midst of continued shelling, so he might personally assess the situation. After seeing that fixed-wing departures were not an option (a decision Martin did not want to make without firsthand knowledge of the situation on the ground, in case the helicopter lift failed), Martin gave the green light for the helicopter evacuation to begin in earnest. Reports came in from the outskirts of the city that the PAVN were closing in. At 10:48, Martin relayed to Kissinger his desire to activate
Operation Frequent Wind, the helicopter evacuation of U.S. personnel and at-risk Vietnamese. At 10:51 on 29 April, the order was given by
CINCPAC to commence Operation Frequent Wind. Under this plan,
CH-53 and
CH-46 helicopters were used to evacuate Americans and friendly Vietnamese to ships, including the
Seventh Fleet, in the South China Sea. The main evacuation point was the DAO Compound at Tan Son Nhut; buses moved through the city picking up passengers and driving them out to the airport, with the first buses arriving at Tan Son Nhut shortly after noon. The first CH-53 landed at the DAO compound in the afternoon, and by the evening, 395 Americans and more than 4,000 Vietnamese had been evacuated. By 23:00 the U.S. Marines who were providing security were withdrawing and arranging the demolition of the DAO office, American equipment, files, and cash.
Air America UH-1s also participated in the evacuation. The original evacuation plans had not called for a large-scale helicopter operation at the
United States Embassy, Saigon. Helicopters and buses were to shuttle people from the embassy to the DAO Compound. However, in the course of the evacuation it turned out that a few thousand people were stranded at the embassy, including many Vietnamese. Additional Vietnamese civilians gathered outside the embassy and scaled the walls, hoping to claim refugee status. Thunderstorms increased the difficulty of helicopter operations. Nevertheless, the evacuation from the embassy continued more or less unbroken throughout the evening and night. At 03:45 on the morning of 30 April, Kissinger and Ford ordered Martin to evacuate only Americans from that point forward. Reluctantly, Martin announced that only Americans were to be flown out, due to worries that the North Vietnamese would soon take the city and the Ford administration's desire to announce the completion of the American evacuation. Martin was ordered by Ford to board the evacuation helicopter. The call sign of that helicopter was "Lady Ace 09", and the pilot carried direct orders from Ford for Martin to be on board. The pilot, Gerry Berry, had the orders written in grease-pencil on his kneepads. Martin's wife, Dorothy, had already been evacuated by previous flights, and left behind her suitcase so a South Vietnamese woman might be able to squeeze on board with her. "Lady Ace 09" from USMC squadron
HMM-165 and piloted by Berry, took off at 04:58—though he didn't know it, had Martin refused to leave, the Marines had a reserve order to arrest him and carry him away to ensure his safety. The embassy evacuation had flown out 978 Americans and about 1,100 Vietnamese. The Marines who had been securing the embassy followed at dawn, with the last aircraft leaving at 07:53. 420 Vietnamese and South Koreans were left behind in the embassy compound, with an additional crowd gathered outside the walls. The Americans and the refugees they flew out were generally allowed to leave without intervention from either the North or South Vietnamese. Pilots of helicopters heading to Tan Son Nhut were aware that PAVN anti-aircraft guns were tracking them, but they refrained from firing. The Hanoi leadership, reckoning that completion of the evacuation would lessen the risk of American intervention, had instructed Dũng not to target the airlift itself. Meanwhile, members of the police in Saigon had been promised evacuation in exchange for protecting the American evacuation buses and control of the crowds in the city during the evacuation. Although this was the end of the American military operation, Vietnamese continued to leave the country by boat and, where possible, by aircraft. RVNAF pilots who had access to helicopters flew them offshore to the American fleet, where they were able to land. Many RVNAF helicopters were dumped into the ocean to make room on the decks for more aircraft. RVNAF fighters and other planes also sought refuge in Thailand while two
O-1s landed on . Martin was flown out to the , where he pleaded for helicopters to return to the embassy compound to pick up the few hundred remaining hopefuls waiting to be evacuated. Many Vietnamese nationals who were evacuated were allowed to enter the United States under the
Indochina Migration and Refugee Assistance Act. Decades later, when the U.S. government reestablished diplomatic relations with Vietnam, the former embassy building was returned to the United States. The historic staircase that led to the rooftop helicopter pad in the nearby apartment building used by the CIA and other U.S. government employees was salvaged and is on permanent display at the
Gerald R. Ford Museum in
Grand Rapids, Michigan.
Final assault In the early hours of 30 April, Dũng received orders from the Politburo to attack. He then ordered his field commanders to advance directly to key facilities and strategic points in the city. The first PAVN unit to enter the city was the
324th Division. By now, the government had not made any sort of appeals to the people for donations of blood, food, etc. On the morning of 30 April, PAVN sappers attempted to seize the Newport Bridge but were repulsed by the ARVN Airborne. At 09:00 the PAVN tank column approached the bridge and came under fire from ARVN tanks which destroyed the lead
T-54, killing the PAVN Battalion commander. The ARVN 3rd Task Force,
81st Ranger Group commanded by Major Phạm Châu Tài defended Tan Son Nhut and they were joined by the remnants of the Loi Ho unit. At 07:15 on 30 April, the PAVN 24th Regiment approached the Bay Hien intersection () 1.5 km from the main gate of Tan Son Nhut Air Base. The lead T-54 was hit by
M67 recoilless rifle and then the next T-54 was hit by a shell from an
M48 tank. The PAVN infantry moved forward and engaged the ARVN in house to house fighting forcing them to withdraw to the base by 08:45. The PAVN then sent three tanks and an infantry battalion to assault the main gate and they were met by intensive anti-tank and machine gun fire knocking out the three tanks and killing at least 20 PAVN soldiers. The PAVN tried to bring forward an
85 mm antiaircraft gun, but the ARVN knocked it out before it could start firing. The PAVN 10th Division ordered eight more tanks and another infantry battalion to join the attack, but as they approached the Bay Hien intersection they were hit by an airstrike from RVNAF jets operating from
Binh Thuy Air Base which destroyed two T-54s. The six surviving tanks arrived at the main gate at 10:00 and began their attack, with two being knocked out by antitank fire in front of the gate and another destroyed as it attempted a flanking manoeuvre. Also on 30 April 1975 as the PAVN
2nd Corps deep penetration unit advanced towards Saigon, soldiers at
Thủ Đức Military Academy engaged the PAVN armored column on Route 15. Several tanks were detached to deal with the resistance and one was destroyed before the soldiers at the academy surrendered.) under Commander Nguyễn Tất Tài and Commissar Bùi Văn Tùng was the first unit to burst through the gates of the Independence Palace around noon. Tank 843 (a Soviet
T-54 tank) was the first to directly hit and struck the side gate of the Palace. This historic moment was recorded by the Australian cameraman
Neil Davis. Tank 390 (a Chinese
Type 59 tank) then crashed through the main gate in the middle to enter the front yard. For many years, the official record of Vietnamese government and international historical sources maintained that tank 843 was the first one to enter the Presidential Palace. However, in 1995, French war photographer
Françoise Demulder published her photo showed that tank 390 entered the main gate while tank 843 was still behind the steel columns of the smaller gate on the right hand side (view from inside) and tank 843's commander Bùi Quang Thận was running with the Vietcong flag on his hand. Lieutenant Thận pulled down the
Flag of South Vietnam on top of the Palace and raised the Viet Cong flag at 11:30 am on 30 April 1975. The Tank Brigade 203 soldiers entered the Palace and found Minh and all members of his cabinet sitting and waiting for them. Commissar Tùng arrived at the Palace ten minutes after the first tanks. Tùng then wrote a speech announcing the surrender and dissolution of what remained of the South Vietnamese government. He then escorted Minh to the
Radio Saigon to read it to avoid further needless bloodshed. The surrender announcement was recorded by German journalist Börries Gallasch's tape recorder. Colonel
Bùi Tín, a military journalist was at the Palace around noon to witness the events. In his memoir, he confirmed that Lt. Col. Bùi Văn Tùng was the one who accepted the surrender and wrote the statement for Minh. This claim was repeated after his defection from Vietnam and sometimes cited mistakenly by foreign correspondents and historians. At 2:30, Minh announced the formal surrender of South Vietnam: {{cquote|
I, General Dương Văn Minh, president of the Saigon administration, appeal to the armed forces of the Republic of Vietnam to laydown their arms and surrender unconditionally to the forces of the Liberation Army of South Vietnam. Furthermore, I declare that the Saigon government is completely dissolved at all levels. From the Central government to the local governments must be handed over to the Provisional Revolutionary Government of the Republic of South Vietnam. Tùng then took the microphone and announced, "We, the representatives for the forces of the Liberation Army of South Vietnam, solemnly declare that the City of Saigon was completely liberated. We accepted the unconditional surrender of General Dương Văn Minh, the president of the Saigon administration". This announcement marked the end of the Vietnam War. ==Aftermath==