Part of the Vietnam War (1967–1968)
| Operation Lancaster | |||||||
|---|---|---|---|---|---|---|---|
| Part of the Vietnam War | |||||||
 A Marine barters with Vietnamese civilians during Operation Lancaster | |||||||
| |||||||
| Belligerents | |||||||
 United States |
 North Vietnam | ||||||
| Commanders and leaders | |||||||
| COL Joseph Lo Prete |
| ||||||
| Units involved | |||||||
| 3rd Marine Regiment |
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| Casualties and losses | |||||||
| 22 killed | US body count: 46 killed | ||||||
Operation Lancaster was a U.S. Marine Corps operation that took place in northern Quảng Trị Province from November 1967 to January 20, 1968.