United States Army MEDDAC Fort Hunter-Stewart Unit Crest (Health Through Service)Criteria: Unit Crests are unique to each unit in the U.S. Army and are officially known as Distinctive Unit Insignia - although most Soldiers refer to them as Unit Crests. The insignia design is derived from the coat of arms authorized for a unit. All personnel assigned to the organization wear the insignia, except general officers, the Sergeant Major of the Army and the Senior Enlisted Advisor to the Chairman. Enlisted personnel wear the unit crests on the green