English: Marines with Combat Assault Battalion, Ground Combat Element, 3rd Marine Expeditionary Brigade Forward, III Marine Expeditionary Force, in amphibious assault vehicles train with smoke grenades here Feb. 11, 2011. The training evolution also included courses of fire with the M2 .50 caliber heavy machine gun and the Mk19 automatic grenade launcher at a newly-constructed range built for multinational training by Marines from 4th Marine Regiment, 3rd Marine Division, III MEF, and Combat Assault Battalion, 3rd MarDiv, both assigned to GCE during Exercise Cobra Gold 2011.Cobra Gold 2011 is a yearly multinational, joint training exercise designed to improve partner nation interoperability.