"The infantry regiment was organized with three battalions, twelve lettered companies (A-M, skipping J), an Infantry Cannon Company (first equipped with two halftrack-mounted 105mm howitzers and six halftrack-mounted 75mm howitzers or guns, and later with a towed short-barrelled 105mm howitzer), an Antitank (AT) Company (initially with twelve 37mm and later nine 57mm AT guns), and a Service Company. The fourth company in each battalion (D, H, M) were heavy weapons companies with sustained fire heavy machine guns and mortars. The regiment and each battalion also had a H&H Company. The regimental H&H Company included a Intelligence and Reconnaissance Platoon, the battalion H&H company included an Amunition and Pioneer (A&P, responsible for light engineering duties and for transporting ammunition forward to the line companies) Platoon and an AT Platoon (initially with four 37mm and later with 3 57mm AT guns)."
Google "329th Infantry" and several sites are availible with the history and WWII service. A very interesting one is from someone who discovered is wife saved all his letters and pictures he had sent her. Several of the pictures have no name to identify the person. http://www.ameribytes.com/329thInfantry/index.htmlhttp://www.ameribytes.com/329thInfantry/index.html