And US troops are firing M777 howitzers.
Read more about the M777 here.
As well as M109 Paladins.
Read more about the Paladin here, and watch a demo video of it firing from inside here.
Here's a wide shot of how the M777s are set up.
But US troops are not alone at the base as they're operating alongside Iraqi forces.
"Iraqi commanders normally select the targets," NPR's Arraf said. "The strikes are mostly in remote areas. The U.S. military says it takes care to avoid civilian casualties."
Here's the first shot released a couple weeks ago of the troops playing baseball.
"I think Fourth will be good spent playing ball," Private Clayton Mogensen told NPR. "We've got a few baseballs here, and we take the handle from a pickaxe and set bases up and just have a good time."