National Defense Act of 1920 Forms 45th Infantry Division

Following World War I, the National Defense Act of 1920 created the authority to form the 45th Infantry Division from the four states of Oklahoma, Colorado, Arizona and New Mexico. The division was organized in 1923, and Oklahoma members camped together for the first time at Fort Sill, Oklahoma, in 1924.
More: http://45thdivisionmuseum.com/History

The National Defense Act of 1920 was passed by Congress on June 4, 1920.
More: https://en.wikipedia.org/wiki/National_Defense_Act_of_1920

Did you know?
For the first 15 years of its existence, members of the 45th Infantry Division proudly wore on their left shoulders an ancient American Indian symbol of good luck, most commonly referred to as the swastika. However in 1933 the symbol became so closely associated with German national socialism that it was dropped by the 45th. In 1939 the Thunderbird was adopted.
More: http://45thdivisionmuseum.com/Swastika