UNITED STATES ARMY

18th INFANTRY REGIMENT, 1st INFANTRY DIVISION  •  D-DAY ORGANIZATION 1944 Regulations

Infantry regiments of the US Army were organized with a regimental headquarters company, three infantry battalions, a regimental cannon company, a regimental antitank company, and a regimental service company (supply and transportation). Each battalion had a headquarters company, three rifle companies and a heavy weapons company. The cannon company had six towed M3 105mm light howitzers and the antitank company had nine towed 57mm antitank guns. The three battalion headquarters companies included an antitank platoon with three 57mm AT guns, for a regimental total of eighteen. Each battalion heavy weapons company had six 81mm mortars and eight caliber .30 machine guns. The rifle companies had a weapons platoon with three 60mm mortars and two caliber .30 machine guns. Guidons for infantry companies had a dark blue field with insignia, numbering, and lettering in white. For the regimental headquarters company, the regimental number was above and the monogram HQ was below the Infantry branch insignia, crossed muskets. Battalion headquarters companies had the battalion number below the branch insignia, the service company had the monogram S, and the rifle companies were lettered. Lettering was consecutive throughout the regiment: companies of the 1st Battalion were lettered A, B, C, D; those of the 2nd Battalion were lettered , E, F, G, H; and those of the 3 Battalion I, K, L, M—J being skipped. The regimental cannon and antitank companies had guidons displaying the branch insignia only.

REGIMENTAL HEADQUARTERS COMPANY
1st BATTALION	2nd BATTALION
3rd BATTALION

REGIMENTAL CANNON COMPANY REGIMENTAL ANTITANK COMPANY REGIMENTAL SERVICE COMPANY

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