U.S. Army soldiers fire a 120-millimeter mortar round. U.S. Army soldiers fire a 120-millimeter mortar round from Forward Operating Base Wilson in Iraq on Nov. 21, 2004. The mortar team is responsible for counter fire and terrain denial when anti-coalition forces fire on the base. The soldiers are assigned to 1st Battalion, 4th Cavalry Regiment, 1st Infantry Division. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 837713-Y-RXM73-248.jpg Photo Gallery