Fort McCoy (U.S. Army) Fort McCoy is a United States Army post located in Monroe County, Wisconsin. Established during World War I, it was initially named Camp McCoy and primarily served as a training facility for the U.S. Army. Today, it remains an active military installation, providing support for various military operations and hosting National Guard units from multiple states for training exercises. Fort McCoy is one of the largest Army Reserve centers in the United States and plays a significant role in the readiness and mobilization of U.S. troops. The post covers over 60,000 acres and offers diverse training facilities, including live-fire ranges, tactical villages, and obstacle courses. Its history and ongoing operations reflect the U.S. Army’s commitment to preparedness and readiness for a wide range of potential military scenarios.