Coats of arms of US Army units are heraldic emblems associated with units in the US Army. Under Army Regulation 840-10, each regiment and separate table of organization and equipment (TOE) battalion of the US Army is authorized a coat of arms to be displayed on the organization's flag, called the "colors." This coat of arms usually forms the basis for the unit's distinctive unit insignia (DUI), the emblem worn by all members of the unit on their service uniforms.
Below are galleries of the coats of arms of US Army units. The official mottoes (as awarded by The Institute of Heraldry of the U.S. Army) and/or special designations (as awarded by the United States Army Center of Military History) of the units are also noted.
The coats of arms for artillery units normally incorporate the color red, which has been the traditional color of the in the US Army since the formation of the Corps of Artillery in 1777. In 1917 the numbers from 1 through 100 were reserved for the Regular Army, from 101 through 300 for the National Guard, and 301 and above for the National Army. Under this system the 1st through 21st and 76th through 83d were organized in the Regular Army; the 101st through 151st, in the National Guard; and the 301st through 351st, plus the 25th through 75th and the 84th and 85th, in the National Army. Several numbers in national guard units have been "reused" so that its possible to have two units with same number, but at different time periods.
The coats of arms for infantry units normally incorporate the color blue, which has been the traditional color of the in the U.S. Army since 1851. Active duty units that have served in war are authorized a crest. National Guard units are authorized the crest for their respective state, while Army Reserve units are all authorized a crest depicting a minuteman.