The war was still going on. Men went mad and were rewarded with medals...
Yossarian tried to remind people, they drew away from him and thought he was crazy.
"They're trying to kill me," Yossarian told him calmly.
"No one's trying to kill you," Clevinger cried.
"Then why are they shooting at me? Yossarian asked.
"They're shooting at everyone, they're trying to kill everyone," Clevinger answered.
"An what difference does that make?" Yossarian asked.

Yossarian had proof, because strangers he didn't know shot at him with cannons every time he flew up into the air to drop bombs on them, and it wasn't funny at all.