Operation Toan Thang I

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Operation Toan Thang I
Part of Vietnam War
Date8 April - 31 May 1968
Result Allies claim operational success
 South Vietnam
 United States
Provisional Revolutionary Government of the Republic of South Vietnam Viet Cong
Commanders and leaders
South Vietnam LTG Đỗ Cao Trí
United States LTG Frederick C. Weyand
South Vietnam 1st Taskforce
5th Ranger Group
Fifth Division
25th Division
18th Division
United States25th Infantry Division
11th Armored Cavalry Regiment
199th Light Infantry Brigade
Australia 1st Australian Task Force
Thailand Royal Thai Army Expeditionary Division
Thailand 9th Infantry Division
9th Division
Casualties and losses
South Vietnam 762 killed
United States 564 killed
Others: 23 killed[1]
US/Allied claim: 7645 killed
1708 captured
3098 weapons recovered[1]:8

Operation Toan Thang I ("Complete Victory") was a U.S. Army, Army of the Republic of Vietnam (ARVN), 1st Australian Task Force and Royal Thai Volunteer Regiment operation conducted between 8 April and 31 May 1968 in the Vietnam War. The operation was part of a reaction to the Tet Offensive designed to put pressure on Vietcong (VC) and People's Army of Vietnam (PAVN) forces in III Corps.


Following the successful conclusion of Operation Quyet Thang which reestablished South Vietnamese control in the areas around Saigon, II Field Force commander LTG Frederick C. Weyand expanded the security operations from around Saigon into a counteroffensive involving nearly every combat unit in III Corps to pursue VC/PAVN forces.[2]:464


The operation commenced on 8 April. In its first week Allied troops killed 709 VC/PAVN, in the second week 892 VC/PAVN were killed and in the last week of April 792 VC/PAVN were killed. Most of these losses resulted from squad and company-size firefights or helicopter gunship, tactical air strikes or artillery fire missions.[2]:465-6

On the early morning of 12 April while the 3rd Brigade, 25th Infantry Division swept VC Base Area 355, a forested area 5km northwest of the Michelin Rubber Plantation, VC sappers from the 271st Regiment attacked the southwestern part of the night defense position of the 3rd Battalion, 22nd Infantry Regiment. The Americans returned fire as several hundred mortar rounds began to hit the position. At 04:00, a VC battalion came out of the trees and headed for the sector held by Company B. By 04:30, the VC had breached the perimeter and was threatening to push further in. At 05:00 the VC advance was stopped air and artillery strikes and the defenders were able to organize a counterattack. The reconnaissance platoon from the 3/22nd Infantry arrived to help Company B and at 06:15 a group of M113s from the 2/22nd Infantry arrived forcing the VC to break contact and withdrew by 07:00, leaving behind 153 dead. U.S. losses were 16 killed. The 3/22nd Infantry pursued the 271st Regiment and killed another 51 VC for the loss of 7 U.S. killed.[2]:466

On 18 April Troop A, 1st Squadron, 4th Cavalry Regiment engaged a VC force in a bunker complex 19km east of Bến Cát. The VC used CS gas against the Americans and eventually disengaged, losing at least 57 killed.[2]:466


The operation was a success with allied forces claiming 7645 VC/PAVN killed, however the operation did not prevent the VC/PAVN from launching their May Offensive attacks against Saigon.

With improved security in the countryside South Vietnamese Civil Operations and Revolutionary Development Support teams began returning to the villages and hamlets which had been abandoned to the VC with the start of the Tet Offensive. These teams generally found that the rural population was dismayed by the Allies’ failure to protect them in the Tet Offensive and yearning for effective security from the VC, who had been taxing and recruiting them during the preceding 2 months.[2]:466-7


 This article incorporates public domain material from websites or documents of the United States Army Center of Military History.

  1. ^ a b "The Defense of Saigon" (PDF). Project CHECO, Pacific Air Force. 14 December 1968. p. 9. Retrieved 27 June 2018.
  2. ^ a b c d e Villard, Erik (2017). United States Army in Vietnam Combat Operations Staying the Course October 1967 to September 1968. Center of Military History United States Army. ISBN 9780160942808. This article incorporates text from this source, which is in the public domain.