On March 5, 1966, 5th Marines deployed to the Republic of Vietnam.
They remained in Vietnam for the next five years, fighting at Rung Sat, Chu Lai, Phu Loc, Hue, Que Son Valley, An Hoa, Tam Kỳ and Da Nang. The 5th Marines finally left Vietnam in April 1971.
In 2003, former 5th Marine sniper-turned-Vietnam War author, John J. Culbertson, documented in 13 Cent Killers: The 5th Marine Snipers in Vietnam, the stories of 5th Marine Regiment marksmen who, as the publisher describes,
“fought with bolt rifles and bounties on their heads during the fiercest combat of the war, from 1967 through the Tet battle for Hue in early 1968.”