Lone Tree Milsim participates in a large-scale milsim event called Copperhead X hosted by American Milsim, held at a training facility in the New Mexico desert. The Green Team, known as COST, attempts a coordinated assault on a strategic market location held by the Tan Team, UFS. After a bumpy ride on a technical vehicle, the squad dives into intense close-quarters battles, navigating through abandoned buildings and trying their best not to trip over their own gear while clearing rooms.

DesertFox Airsoft talks about doing more brain power during American Milsim's Copperhead X... "Milsim is a series of tactical problem solving. As the leader of an element, it’s your responsibility to solve strategic puzzles with the assets you brought to the fight or what you’re dealt in the moment. On an individual and leadership level problem solving involves finding and using information to your advantage through fires and maneuver or deception to accomplish your goals.