A shoulder sleeve insignia (SSI) is an embroidered emblem worn on the sleeves of some United States Army uniforms to identify the primary headquarters to which a soldier is assigned. Like division sized units, separate brigades of the U.S. Army are allowed their own SSI to distinguish their wearers from those of other units. Most military units smaller than brigades do not have SSI, but rather wear the SSI of a higher headquarters. The following list of SSIs represent some of the current and former brigades of the U.S. Army: