Insignia Description
A maroon shield bearing within a wreath of silver oak leaves the helmet of an esquire charged with the shoulder sleeve insignia of the First Division, a shield with the figure "1." All above a silver scroll bearing the inscription "FORTITUDE AND COMPASSION" in black letters.

Symbolism
Maroon and white (silver) are the colors used by the Army Medical Service. The red numeral "1" on an olive drab shield is the shoulder sleeve insignia of the 1st Division as authorized 31 October 1918, and with which the unit served in World War I. The helmet indicates the military character of the organization.

History
The distinctive unit insignia was originally approved for the 1st Medical Regiment on 19 Dec 1923. It was redesignated and amended to include the motto for the 1st Medical Group on 20 Mar 1968. On 26 Apr 1968 it was amended to correct the symbolism. The insignia was redesignated on 6 Jun 2000 for the 1st Medical Brigade.

Source: The US Army Institute of Heraldry