You see the same thing in the peacetime Army (or Marines) here is the US, when they're out in the field. It's hard work, and the hours are long. Soldiers and Marines are grateful for a few minutes of sleep, even if it's in their gear, in a vehicle, or under a vehicle. It's how they make a tough job a bit easier. Sleep is a luxury, and you grab it when it's available.
The writer is a pansy.
"DING DING DING! What do we have for him, Johnny?"