Fort Custer Training Center, often known simply as Fort Custer, is a federally owned and state-operated Michigan Army National Guard training facility, but is also used by other branches of the armed forces and armed forces from Illinois, Indiana, and Ohio. It is one of the most heavily used Midwest training facilities, and is used mainly for company level small arms and maintenance training. The 20th Century Tactical Studies Group (based in the US Midwest), holds two battles there every year.