Which historical event does the Air Force Birthday commemorate?

The Air Force Birthday commemorates the establishment of the U.S. Air Force as a separate branch of the military. This significant event occurred on September 18, 1947, when the National Security Act of 1947 officially separated the Air Force from the Army, recognizing it as an independent military service. This change was crucial in adapting to the evolving nature of warfare and airpower during and after World War II. Celebrating this date honors the heritage and contributions of those who serve in the Air Force, emphasizing the importance of air power in national security and military strategy.

Other historical events mentioned, such as the foundation of the Air Corps and the signing of the Declaration of Independence, do not specifically pertain to the Air Force becoming an independent entity, while the end of World War II, while significant, does not correlate directly with the establishment of the Air Force as a separate branch.