Navy Medical Corps Collar Device Breast Insignia This has no political significance:

This has no political significance: on the officers ornament

Five years of cumulative service at a Boat Force field unit is required as part of the criteria for earning the Basic insignia

United States Army Combat Medical Badge

biological

One must also attend one CONUS and one OCONUS exercise or deployment

Navy Medical Corps Collar Device Breast Insignia This has no political significance:United States Navy Medical Corps Collar Device Criteria: The Medical Corps of the United States Navy consists of military physicians in a variety of specialties. It is the senior corps among all staff corps, second in precedence only to line officers. The corps of commissioned officers was founded on March 3, 1871. Prior to the formal establishment of the corps, ships' surgeons served without commissions, unless given one by the commanding officer.