Volk Field — Camp Douglas, United States

Volk Field is a military airfield located in Wisconsin, operated as a training installation for the Wisconsin Air National Guard. VOK is not a civilian passenger facility; rather, it functions as a Combat Readiness Training Center supporting fighter squadron exercises, joint military drills, and airspace training for various branches of the U.S. armed forces. The base includes extensive runway infrastructure, range facilities, and support buildings designed for realistic combat training scenarios. Volk Field has hosted units from multiple states and international partners participating in joint exercises. Its designation as VOK reflects its inclusion in aviation databases despite lacking scheduled commercial air service.