U.S. Army 364th Civil Affairs Brigade. This version is designed for use on the Army Combat Uniform (ACU). The patch features a white arrowhead on a black rectangular background. Purple and white are the primary colors in the standard (color) version of the insignia, reflecting its status as a Civil Affairs organization. The insignia was approved on December 21, 1976. The brigade is an Army Reserve unit headquartered in Clackamas, Oregon. Dimensions: 3in x 2in