Marshall Army Air Field — Fort Riley (Junction City), United States

FRI is Marshall Army Air Field, the military airfield serving Fort Riley near Junction City, Kansas, home to the U.S. Army's 1st Infantry Division. As an active-duty military installation, FRI primarily supports Army aviation operations, including helicopter and fixed-wing training, troop deployments, and logistics tied to Fort Riley's role as a major Army post. Civilian access is restricted compared to public airports, reflecting its military mission. The airfield's operations are closely tied to the base's training exercises and deployment cycles, making its traffic patterns and activity levels dependent on Army scheduling rather than the commercial demand that drives typical regional airports.