 On 8 October 1967 when the guerrillas' final battle commenced in the Yuro Ravine, Willy was leading the "center" group as they tried to find a way to break out of the Army's encirclement.Willy was just at the point of clearing the steep wall of the ravine when Guevara, following some distance behind him, received a sudden blast of machine gun fire that wounded him in the leg.Willy turned around and went back down the cliff to where Guevara lay.