What year was the U.S. Air Force established by the National Security Act?

The U.S. Air Force was established by the National Security Act on September 18, 1947. This legislation was a significant restructuring of the U.S. military following World War II, which aimed to unify the armed services under a single framework to enhance national security. The Act created a distinct branch of the military specifically for air operations, reflecting the increasing importance of air power in modern warfare.

The timing of this establishment was also pivotal, as it followed a period of rapid technological advancements in aviation and a growing recognition of the strategic value of air forces. By distinguishing the Air Force from the Army and Navy, the National Security Act allowed for specialized training, doctrine development, and operational focus unique to air power, which has since shaped military strategy and operations.

The other answer choices reflect years that do not align with the official establishment date, which is why they are not correct.