690th Support Battalion Unit Crest (Unparalleled) - Sold in Pairs Tactical Jacket The grey portion of the

The grey portion of the shield symbolizes the erupting Old Faithful geyser in Wyoming

This DUI was redesignated for the 4th Aviation Regiment in 1987

the first explorer of the Caribbean area

These distinctive unit insignia (DUI) were originally approved in 1928 and worn by multiple artillery regiments and battalions

The alternating blue and grey color squares commemorate the service of Maryland's units in World War I and World War II

690th Support Battalion Unit Crest (Unparalleled) - Sold in Pairs Tactical Jacket The grey portion of theUnited States Army 690th Support Battalion Unit Crest (Unparalleled) 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