The color(s) red, gold, blue, black, white, yellow, green and gray is/are claimed as a feature of the mark.
"EXPEDITIONARY UNIT"
The mark consists of a circular design bordered in a braided design of gold and black. Within this border is a field of blue, as well as 12 stars in gold. Also within the field of blue is a design consisting of an eagle, in white, black and gold, with a red and white streamer in its mouth with the words "SEMPER FIDELIS" in white. The eagle sits atop a shield with red and white stripes, and arrows. Beneath the shield is a banner, in red and gold, with the words "13th MARINE EXPEDITIONARY UNIT" in red. Under this banner is a globe showing the Pacific Ocean, in gray, and its land masses in green, along with a rifle, in black, and a lightning bolt, in yellow bordered in black. At the bottom of the field of blue are the words "THE FIGHTING 13TH" in yellow.
SEMPER FIDELIS THIRTEENTH MARINE EXPEDITIONARY UNIT THE FIGHTING THIRTEENTH
The English translation of "SEMPER FIDELIS" in the mark is "ALWAYS FAITHFUL".