Camp Casey-Dongduchon (H-220) Airfield, designated RKST, is a U.S. Army military airfield located at Camp Casey near Dongduchon, South Korea. It serves as a helipad and light aviation facility supporting U.S. and allied military operations in the northern portion of the Korean Peninsula. The airfield is part of the broader network of U.S. Forces Korea (USFK) installations in the region. Camp Casey itself has been a major U.S. Army installation for decades, positioned near the Demilitarized Zone (DMZ) and serving as a key component of the defense posture on the peninsula. The facility is not open to civilian traffic and has no commercial airline service. Operations are restricted to military personnel and authorized government aircraft.