18th ADA (Air Defense Artillery) Group Unit Crest (Defense in Depth) - Sold in Pairs SBBA~Double~11075DBR United States Army 45th Infantry

United States Army 45th Infantry Brigade Combat Service Identification Badge

service personnel must have attended with an SMCR unit at least 90% of all scheduled drills in a year for three consecutive years

a service member must have completed initial sonar technology training followed by 18-24 months of field experience in naval undersea surveillance

United States Army Military Intelligence Readiness Command Unit Crest

For two years starting in 1968 they were also worn by the 16th Armor

18th ADA (Air Defense Artillery) Group Unit Crest (Defense in Depth) - Sold in Pairs SBBA~Double~11075DBR United States Army 45th InfantryUnited States Army 18th ADA (Air Defense Artillery) Group Unit Crest (Defense in Depth) 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