The Combat Service Identification Badge uniquely identifies a Soldier's combat service with a specific major U.S. Army unit. The CSIB is authorized for immediate use on the new blue Army Service Uniform, Class A, Army Service Uniform Class B, and the transitioning (old) blue uniform. The CSIB cannot be worn on the Army Combat Uniform (ACU) or the Army Green Uniform. Soldiers will continue to wear the Shoulder Sleeve Insignia-Former Wartime Service (full-color unit patch denoting service with a specific U.S. Army unit) on their right sleeve of the ACU and Army Green Uniform to denote combat service. The CSIB is worn centered on the right breast pocket for male Soldiers and on the right side - parallel to the waistline - for female Soldiers. The CSIB is ranked fifth in the order of precedence for identification badges outlined in Army Regulation 670-1, para 29-18.