XXI Corps, US Army
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XXI CORPS, US ARMY
On a blue four-leaf clover two crossed arrows in white, points up, superimposed thereon a red acorn fimbriated white all on a 2 3/4 inches (6.99cm) square Army Green background.
The crossed arrows are representative of the fighting power of the organization, the acorn is indicative of strength, and the four-leaf clover represents good fortune.
The shoulder sleeve insignia was originally approved for the XXI Army Corps on 3 April 1944. It was redesignated for the XXI U. S. Army Corps, Army Reserve on 11 October 1957 and on 4 November 1957 it was amended to delete the words "Army Reserve." The insignia was amended on 28 May 1959 to change the background color from olive drab to Army Green. A distinctive unit insignia was not approved for the XXI U. S. Army Corps.
Literature: Image from Wikimedia Commons. Information from The Institute of Heraldry, US Army.