Authorised 29 October 1924
A silver color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a shield blazoned: Parti per chevron wavy Azure and Argent in dexter chief a cross patée of the second in sinister chief a sea lion with sword in dexter paw of the like langued Gules in base a northern hemisphere with a transport in each ocean both sailing from east to west, all Proper. Attached below the shield a silver scroll inscribed "WE SERVE" in Blue letters.
The shield is blue and white, the colors of Infantry. The Civil War service is indicated by the white cross of the 5th Corps and the early Philippine service by the sea lion taken from the seal of Manila. The Mont Blanc Campaign of October 1918 in World War I is commemorated by the outline of the lower half of the shield. The Regiment has the unique distinction of being the first American regiment to circumnavigate the globe and this is indicated in the base of the shield.
The distinctive unit insignia was originally approved on 29 October 1924. It was amended on 6 August 1968 to add the motto. It was amended to update the description and symbolism on 12 June 2009. Coat of Arms