4th Air Force

The 4th Air Force is a division of the U.S. Air Force that focuses on supporting the reserve components, primarily by training, organizing, and ensuring readiness. Based largely in the western United States, it integrates reserve personnel into the overall Air Force structure, enabling rapid deployment and effective response to national security needs. Its role includes managing reserve units, providing logistical support, and maintaining operations that complement active-duty forces, ensuring they can work seamlessly together during peacetime and emergencies.