Part of the Vietnam War (1967)
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| Operation Union | |||||||
|---|---|---|---|---|---|---|---|
| Part of the Vietnam War | |||||||
 Marines cross paddy dikes | |||||||
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| Belligerents | |||||||
 United States |
 North Vietnam | ||||||
| Commanders and leaders | |||||||
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MG Herman Nickerson Jr. Lt. Col. Peter Hilgartner |
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| Units involved | |||||||
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1st Battalion, 1st Marines 2nd Battalion, 1st Marines 3rd Battalion, 1st Marines 1st Battalion, 5th Marines | 2nd Division | ||||||
| Casualties and losses | |||||||
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110 killed 2 missing | US body count: 865 killed | ||||||
Operation Union was a search and destroy mission in the Que Son Valley carried out by the 1st Marine Regiment from 21 April to 16 May 1967. The object of the operation was to engage the People’s Army of Vietnam (PAVN) 2nd Division.