1st Infantry Unit Crest (Semper Primus) - Sold in Pairs SBBA~Double~11008DBR Some Machinist's Mates are also

Some Machinist's Mates are also trained in Health Physics and maintaining of reactor chemistry for their work required for the maintenance of the machinery involved with nuclear reactors

A Bronze Star is presented for each campaign that the service member participated in and is to be worn on the medal

It dates back to 1854 with the formation of the Washington Territorial Militia

Criteria: Photographer's Mates serve as the Navy's professional photographers

1st Infantry Unit Crest (Semper Primus) - Sold in Pairs SBBA~Double~11008DBR Some Machinist's Mates are alsoUnited States Army 1st Infantry Unit Crest (Semper Primus) 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