Yossarian hated his tentmate. Hate? That's an exaggeration, Yossarian didn't hate Orr. He tolerated him.
It was 1942, and they were both stuck in the heights of the raging War, the United States against the world. Or more specifically the Axis Powers. John Yossarian was a B-25 bombardier in the Army Air Forces, and had just gotten back from the hospital after he faked having some liver problem to get off work.
Yossarian walks through their tent. It was originally built for six people to share, but Orr had changed it into a two persons place. Orr put in more work onto this house than the actually War, honestly.
"What are you doing?" Yossarain asks guardedly when he entered the tent. He spots Orr taking apart the pieces of the sink. Oh, brother.