[footfootfoot]

I just watched the movie Fury, about a WWII tank crew and was reminded of a question I'd had since I was a kid.
When the tanks were in a battle three of them got blown up or disabled during the battle and after there was a brief break before the surviving tanks took off.

I could see leaving the dead behind for others to retrieve or bury since they were on the go and in a hurry, but wouldn't they have picked up the other tanks' shells and ammo to re-stock their own tanks?

It seemed odd to me that they'd just leave weapons on the ground and move on.