May 4-5, 2021 - U.S. Marines with Rotational Force - Darwin conduct a live-fire range with the M240B medium machine gun, M2 heavy machine gun, and Mk 19 40mm grenade launcher at Mount Bundey Training Area, NT, Australia. The training hones the Marines’ capabilities as a skilled and lethal expeditionary fighting force that is capable of responding to a potential crisis or contingency.