Engineers placing C-4 around the bobby-trapped U.S. 105 mm howitzer round that Oakes stepped on.

Patrol during Operation Allen Brook. Right after Oakes took the picture, North Vietnamese machine guns began firing from the opposite bank.

Booby-trapped U.S. 105 mm howitzer round that Oakes stepped on. The round failed to detonate because the dirt around it gave way.

Corpsman attending to wounded soldier who had tripped a booby-trapped hand grenade in the 3/27th Marine's area.