The 1st Marine Division shoulder patch originally was authorized for wear by members of units who served with or were attached to the Division in the Pacific in World War II; it was the first patch to be approved in that war and specifically commemorated the division's sacrifices and victory in the Battle for Guadalcanal. It features the National Colors - red, white, and blue - in its diamond-shaped blue background with red numeral "1" inscribed with white lettering, "GUADALCANAL." The white stars featured on the night-sky blue background are in the arrangement of the Southern Cross constellation, under which the Guadalcanal fighting took place.

1st Marine Division