You wait in the trench. A few hours go by, eventually. There's not much talking. No more arrows are coming in, and nothing's really happening at all.
You wait longer.
You stop keeping track of how long you've been waiting for something to happen.
Later, much, much later, you wake up. Everyone else is gone. It's the next day. You figure that everyone moved out in a raid during the night, and haven't returned yet.
What do you do now?