Part of the Vietnam War (1965)
Source (Wikipedia): Operation Starlite

Operation Starlite was the first major offensive action conducted by a purely U.S. military unit during the Vietnam War from 18 to 24 August 1965. The operation was launched based on intelligence provided by Major general Nguyen Chanh Thi, the Army of the Republic of Vietnam (ARVN) I Corps commander. III Marine Amphibious Force commander Lieutenant General Lewis W. Walt devised a plan to launch a pre-emptive strike against the Viet Cong (VC) 1st Regiment to nullify their threat to the vital Chu Lai Air Base and Base Area and ensure that its powerful communication tower remained intact.