(I am a volunteer genealogist for the several organizations, specialized in military service research.)
Criteria: These unit crests are worn by the 11th Armored Cavalry Regiment. Allons is their motto which stands for Lets Go. Based out of Ft. Irwin, CA their also known as the "Blackhorse Regiment". This distinctive unit insignia (DUI) was approved for wear in 1925. Worn on the Army Service Green and Army Service Uniform (ASU).
Note: Sold in pairs (i.e., if you order a quantity of 1 you will receive two Unit Crests).