Branch insignia
a. Regimental collar insignia. (1) Regimental collar insignia is the soldier’s branch insignia on which the numerical designation of the regiment is affixed. Regimental collar insignia is worn in lieu of the branch insignia by officer and enlisted soldiers affiliated with infantry, armor, field artillery, air defense artillery, cavalry, special forces, or aviation regiments. Soldiers affiliated with these regiments also will wear the regimental collar insignia when not assigned to the regiment, except as provided…