The 4 Combat Training Squadron (4 CTS) is a military unit within the United States Air Force Europe (USAFE). This squadron, stationed at Luwuk Air Base in Poland, specializes in combat training and readiness for allied air forces under NATO. The primary role of the 4 CTS is to provide realistic and challenging training environments that prepare aircrews for various operational scenarios. This includes tactical flying exercises, weapons employment, and mission planning. The squadron operates a fleet of F-16 Fighting Falcons, which allows for advanced flight and combat training. Additionally, the 4 CTS works closely with other NATO allies to ensure interoperability and collective defense capabilities in Europe.