Johnny was mentally traumatised when he witnessed as a child the killing of his father (a deserter) by a group of soldiers. As an adult he randomly kills every soldier he gets hold of, so that the army sends out the brutish Lieutenant Garringo to stop Johnny.
Sheriff Klaus

Antonio Molino Rojo
Harriman

María Salerno
Nancy Grayson (as Marta Monterrey)

Peter Lee Lawrence
Johnny