Lieutenants from Fox Co., The Basic School, try to solve problems during a Convoy Simulator exercise at Camp Upshur on Jan. 16. Throughout the simulation, the lieutenants encountered dangers such as improvised explosive devices and blocked ambushes. - Lieutenants from Fox Co., The Basic School, try to solve problems during a Convoy Simulator exercise at Camp Upshur on Jan. 16. Throughout the simulation, the lieutenants encountered dangers such as improvised explosive devices and blocked ambushes.