What The Heck Is This Truck Pushing Down A Dirt Road?

This Oshkosh L-ATV army truck is pushing some kind of backwards-trailer with way too many wheels. Is it for tilling land with the truck in reverse? Some kind of dust zamboni? I'll give you a hint; "no." Stick your guess in the comments and I'll update later with the answer!

Yes I know you could look it up, but that's no fun...

Image: Oshkosh Defense