Sapper, Soldiers who Build, Repair Roads/Bridges as Well as Clear Mines
"If the [Viet Cong] can have sappers....so can we." A sapper, also called pioneer or combat engineer, is a combatant or soldier who performs a variety of military engineering duties such as breaching, demolitions, bridge-building, laying or clearing minefields, field defenses as well as building, road and airfield construction and repair. They are also trained to serve as infantry personnel in defensive and offensive operations. A sapper's duties are devoted to tasks involving facilitating movement, defense and survival of allied forces and impeding those of enemies.
Bridge destroyed by a night time sapper attack. "Army of the Republic of Vietnam (ARVN) responsible for protecting the bridge but didn't count on attack from the water. I happened to be sleeping, that night, just to the left of where this photo was taken. The explosion bounced me off the ground and scared the crap out of me. Chunks of the bridge were landing around me." -David Wayne. Photo by David Wayne.