ShieldAzure, within a diminished bordure a dexter hand bendwise clench with forefinger wrapped over the thumb Or.
CrestThat for the regiments and separate battalions of the Army Reserve: On a wreath of the colors Or and Azure, the Lexington Minute Man Proper. The statue of the Minute Man, Captain John Parker (H.H. Kitson, sculptor), stands on the Common in Lexington, Massachusetts.
MottoMAH-BE-AH (We Defy).
ShieldThe diminished bordure and the clenched hand are in yellow – the Cavalry color. The hand is taken from the Indian sign language and symbolizes defiance. The motto is in the Shoshone language. The Shoshone Indians were common to the area to which the 324th Cavalry is allocated.
CrestThe crest is that of the United States Army Reserve.
The coat of arms was approved on 16 April 1929. It was rescinded on 26 February 1959.