Shoulder Sleeve Insignia. Description: On a pointed oval shield, 2 inches (5.08 cm) in width and 3 inches (7.62 cm) in height overall, and within an 1/8 inch (.32 cm) scarlet border, a landscape similar to that depicted in the coat of arms of Guam, with sky and sea in light blue, land areas green, palm tree with green foliage and brown trunk and in left foreground a canoe in brown with white sail.
             Symbolism: The design is based on the coat of arms of Guam, showing land, sea and sky, with an ancient flying proa (canoe) approaching the beach near the mouth of the Agana River, and a palm tree in the foreground. The shape of the insignia is that of the sling stones used by the ancient Chamorros in hunting and fighting.
             Background: The shoulder sleeve insignia was originally approved for the Guam Army National Guard on 26 May 1981. It was redesignated for Headquarters and Headquarters Detachment, Territorial Command, Guam Army National Guard effective 30 December 1983. The insignia was amended to correct the height of the insignia and update the description on 3 December 2001. (TIOH Dwg. No. A-1-668)

Distinctive Unit Insignia. Description: A gold color and metal enamel device 1 1/8 inches (2.86 cm) in width overall consisting of a scarlet arch with the motto "A' ADAHEN I TANO" in gold letters enclosing a triple arch gateway of the Spanish colonial period in gold metal with gold demi-sun on a blue field behind it and green field within the gateway arches, all upon a heraldic torse of gold and blue.
             Symbolism: The gateway, its center gates open to the horizon, symbolizes the Guam seat of government and its accessibility to the Guamanian people. The demi-sun alludes to the fact that, in terms of time, Guam lies half a day ahead of the continental United States. The archway is borrowed from the upper half of the border of the official Guam seal (the basis for the Guam Army National Guard shoulder sleeve insignia) to signify support. The red of the arch refers to the fact that Guam fell under enemy occupation, and Guamanians died for the American cause in World War II. The motto means "Guardians of the Land."
             Background: The distinctive unit insignia was originally approved for the Guam Army National Guard on 10 September 1984. It was redesignated for Headquarters and Headquarters Detachment, Territorial Command, Guam Army National Guard on 18 December 1984.

Crest. Description: That for regiments and separate battalions of the Guam Army National Guard: From a wreath of colors, a demi-sun Or bearing a stylized shield Gules, charged with a triton shell Proper, all superimposed by a triple-arched gateway of the Spanish period, also Proper.
             Symbolism: The arched gateway is a symbol of Guam. The demi-sun alludes to the fact that, in terms of time, Guam lies half a day ahead of the continental United States. The stylized shield-shaped, adapted from the Great Seal of the Territory of Guam, suggests a traditional Chamorros weapon. Red, denoting courage and sacrifice, honors the Guamanians who died for the American cause in World War II. The triton is native to Micronesia and has traditionally been fashioned into signal horns, symbolizing vigilance and military preparedness.
             Background: The crest was approved for the Territory of Guam on 29 September 1993.