| Operation Prairie IV | |||||||
|---|---|---|---|---|---|---|---|
| Part of the Vietnam War | |||||||
| |||||||
| Belligerents | |||||||
 United States |
 North Vietnam | ||||||
| Commanders and leaders | |||||||
| Robert E. Cushman, Jr. | Võ Nguyên Giáp | ||||||
| Units involved | |||||||
|
1st Battalion, 4th Marines 1st Battalion, 9th Marines 2nd Battalion, 9th Marines 2nd Battalion, 26th Marines | 324B Division | ||||||
| Casualties and losses | |||||||
| 164 killed |
US body count: 505 killed 9 captured | ||||||
Operation Prairie IV was an operation conducted by the United States Marine Corps in the area around Con Thien, South Vietnam known as Leatherneck Square from 20 April until 17 May 1967. During the course of the fighting Marine casualties were 164 killed 1,240 wounded while claiming 505 People's Army of Vietnam (PAVN) killed and 9 captured.