the current branch insignia emblems of the United States Army: Aide-de-camp and senior enlisted advisors Although not considered a branch of service, U.S. Army officers assigned as aides to flag or equivalent grade officers replace their branch of service insignia for a special aide-de-camp insignia that denote the grade or position of the officer the aide supports. Because these collar insignia are branch immaterial, officers continue to wear their original branch of service colors and Army Regimental System insignia. Army Command Sergeants Major holding the rank/position of Sergeant Major of the Army and Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff replace their Command Sergeant Major/Branch Immaterial insignia with a unique insignia that replicates the shield of the Aide-de-camp insignia to the Army Chief of Staff and Aide-de-camp insignia to the Chairman of the Joint Chiefs of Staff respectively. These shields are superimposed on top of a gold disk, which is traditional for all enlisted branch of service insignia. Obsolete insignia The following insignia are no longer used: See also Heraldry List of United States Navy staff corps References External links Branch Insignia Heraldry of the United States Army United States military specialty insignia