28th Combat Support Hospital Unit Crest (Service Through Mobility) - Sold in Pairs SBBP~156_ALOMOM-plate during which time the Navy

during which time the Navy was experimenting with lighter-than-air craft

CSIB's are worn exclusively on the ACU (dress blue) uniform

Marine Gunners

United States Army 5th Signal Command Unit Crest (Professional Communications)

United States Army Training And Doctrine Command TRADOC Unit Crest (Freedom's Fortress)

28th Combat Support Hospital Unit Crest (Service Through Mobility) - Sold in Pairs SBBP~156_ALOMOM-plate during which time the NavyUnited States Army 28th Combat Support Hospital Unit Crest (Service Through Mobility) 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