I explore the role of affect (rages and panics) and pre-cognitive reflexes in enabling killing in infantry combat. I examine Vietnam-era infantry training, which constructed a practical agent of killing which operated at an emergent group level, using the trained reflexes of individual soldiers as its components. I show that individual soldiers sometimes retrospectively took guilt upon themselves (a responsibility that is traditionally reserved for acts of individual conscious intention) even though the practical agent was the group activating the non-subjective reflexes of the individual soldiers. To explain this phenomenon, I explore proto-empathetic identification, which produces psychological trauma at the sight of the blood and guts of the killed enemy, despite the common practice of dehumanization of the enemy. I also examine cutting-edge digital and video simulator training for urban warfare of the "shoot/no shoot" type, which produces a very quick decision upon recognition of key traits of the situation—an act that is close to reflexive, but a bit more cognitively sophisticated. The same proto-empathetic identification and individual guilt assumption is in play in this training regime, even as the use of real-time communication technology forms ever more distributed group cognition.