What is "An Episode of War" by Stephen Crane primarily about?

A. a doctor who saves a soldier's arm

B. a soldier who loses his arm

C. a soldier who rations supplies

D. a general who plans a battle

The short story is primarily about a soldier who loses his arm. It describes the usual incident during wars which is getting wounded. He returns home without an arm, but supposes it does not matter as much, since the overall war itself is much worse.