The climax or turning point of the "an episode of war" is when the lieutenants arm is amputated.
An Episode of War was written by Stephen Crane. The story is mainly about the lieutenant who is hit by a bullet in the war.
In this very short piece, Stephen Crane plunges the reader immediately into a scene from the American Civil War. A lieutenant, whose name we never know, is wounded in the right arm while resting with his troops during an active battle.