Soldier
A Marine patrol stops at Firebase Gloria at the start of the Tet Offensive during the Vietnam war. With the firebase attacked, the patrol remains to help defend it. The Marines barely hold off the VC (Viet Cong), but in the end, hold the base.
Cactus (as Don Parker)
Really bad acting, low-budget explosions, scenes that really don't fit into the plot, a machine gun mounted on a motorcycle and a map tattooed on a girl's ass.