An M1A1 Abrams Tank from 1st Tank Battalion, Company B, fires its 120 mm main gun toward a target 1200 meters away during an assault on a Military Operation in Urban Terrain town on Range 210 during the Marine Corps Combat Readiness Evaluation Exercise, Jan. 20, 2015. ‘1st Tanks’ and 3rd Assault Amphibian Battalion supported 3rd Battalion, 7th Marine Regiment during their assault of the MOUT. - An M1A1 Abrams Tank from 1st Tank Battalion, Company B, fires its 120 mm main gun toward a target 1200 meters away during an assault on a Military Operation in Urban Terrain town on Range 210 during the Marine Corps Combat Readiness Evaluation Exercise, Jan. 20, 2015. ‘1st Tanks’ and 3rd Assault Amphibian Battalion supported 3rd Battalion, 7th Marine Regiment during their assault of the MOUT.