Of course. That's what people do in a disordered world, a world of freedom and choice: they leave when they want. They disappear, they come back, they leave again. And you are left to pick up the pieces on your own. ↗
Morale was deteriorating and it was all Yossarian's fault. The country was in peril; he was jeopardizing his traditional rights of freedom and independence by daring to exercise them. ↗