It was certainly not lone... maybe a part broke or the truck didn't start. If not theres a couple destroyed beside it. It's impressive that there's one already captured, they lost all std stock and rely already on the new ones ?
The angle is not ideal, but it looks like the integrated tow hook under the muzzle brake might be missing, perhaps broken off and forced to be abandoned. This is the sort of minor damage that I was talking about that would put an entire piece of equipment out of action without proper logistical support.
If it were just the truck that was the issue, then you could tow with any medium weight truck. I think even an F-150 could tow it.