28th Combat Support Hospital Unit Crest (Service Through Mobility) - Sold in Pairs SBBP~156_ALOMOM-plate CSIB's are worn exclusively on

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

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

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

In the United States Navy a midshipman is classified as an officer of the line

A direct result of the Cold War

28th Combat Support Hospital Unit Crest (Service Through Mobility) - Sold in Pairs SBBP~156_ALOMOM-plate CSIB's are worn exclusively onUnited 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