The 39th Infantry Division was an infantry formation of the Army National Guard, originally formed as the 18th Division in 1917. The division consisted of troops from Arkansas, Louisiana, and Mississippi. After training at Camp Beauregard, Louisiana, the division was deployed to France but did not see combat before the end of World War I. In July 1923 the division was re-designated as the 31st Infantry Division. The 39th Infantry Division was reactivated after World War II with troops from Louisiana and Arkansas and its headquarters in Louisiana. In 1967, the 39th Infantry Division was reorganized to become the 39th Infantry Brigade (Separate). Its headquarters was in Little Rock and the unit consisted entirely of troops from Arkansas.

The 31st Infantry Division ("Dixie") was an infantry division of the United States Army National Guard, active almost continuously from 1917 to 1968. Composed of men from Alabama, Florida, Georgia, Louisiana, Michigan, Illinois, and Mississippi at various points in its existence, the division saw service in both World War I and World War II, and was mobilized during the Korean War, although it was not sent overseas in the latter.