What did the National Defense Act of June 4, 1920, govern?

The National Defense Act of June 4, 1920, primarily focused on the organization and regulation of the Army. This landmark legislation authorized the expansion of the Army and detailed the structure, training, and mobilization of Army forces, significantly shaping the military framework and policies of the United States during a time of change in military strategy post-World War I.

It established a more organized and capable Army, which included provisions for the establishment of the Army Reserve and the National Guard as integral components of the national defense structure. Furthermore, it set the stage for future military reforms and adaptations as needs evolved. This act was pivotal in defining how the Army would operate, leading to enhancements in military readiness and efficiency, which ultimately influenced American military policy moving forward.