Upon returning to the United States, the division was stationed at Fort Sam Houston, at San Antonio, Texas as one of three divisions to remain intact and on active duty for the entire interwar period. It remained there for the next 23 years, serving as an experimental unit, testing new concepts and innovations for the Army. The 2nd Division stationed at Camp Bullis and Fort Sam Houston, Texas was the first command reorganized under the new triangular concept of organization theory of warfare, which provided for three separate regiments in each division. Indianhead soldiers pioneered concepts of air mobility and anti-tank warfare, which served the army for the next two decades on battlefields in every corner of the globe.