Insignia Description
A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per fess Argent and Gules in chief a spur gear, in base a shovel fesswise, handle to sinister, counterchanged. Attached below the shield a Silver scroll inscribed "AGENDO GNAVITER" in Red letters.
Symbolism
In the scarlet and white of the Engineer Corps, the functions of the organization are aptly illustrated in the gear and shovel, both symbolizing the mechanical and hand tools necessary in the performance of their work.
History
The distinctive unit insignia was originally approved for the 377th Engineer Battalion on 14 October 1942. It was redesignated for the 377th Engineer General Service Regiment on 15 September 1943. The insignia was redesignated for the 577th Engineer Battalion (Construction) on 8 March 1955
Source: The US Army Institute of Heraldry