It was converted into a signal aircraft warning regiment after the United States entered World War II.

Shortly after the United States entered World War I, the regiment was constituted in the National Army on 18 May 1917 and organized on 6 April 1918 at Camp Owen Bierne, El Paso, Texas, commanded by Colonel Cornelius C. Smith.

[2] An unrelated Organized Reserve unit, the 314th Armored Cavalry Regiment, briefly existed postwar in Tennessee.

The shield's color represented cavalry, the red border its artillery service, the star its organization in Texas, and the palmetto its training at Camp Jackson in South Carolina.

The regimental coat of arms was of a similar design to the distinctive unit insignia but included the Organized Reserve's Minuteman crest above the shield and omitted the motto.