Marines with 4th Law Enforcement Battalion, Force Headquarters Group, Marine Forces Reserve, use crowd and riot control methods to fight off a group of enemy forces at the Muscatatuck Urban Training Center in Butlerville, Ind., June 9, 2016. The Marines focused on non-lethal techniques that could be used to defeat the enemy and accomplish the mission. (U.S. Marine Corps photo by Lance Cpl. Melissa Martens/ Released)