The organizational evolution of the United States Armored Infantry Battalion is actually quite short. This study covers the Battalion as found in the Armored Infantry Regiment of the Armored Division under the March 1942 organization, and the Battalion as part of the of the superseding September 1943 Armored Division organization.
Below are links to the files that make up this study. The first is a narrative of the Battalion organization and how it evolved between 1942 and 1945. This includes notes on vehicles and also appendices on ammunition and communication equipment.
There are then separate files detailing in full the information as found in the Tables of Organization for the unit concerned. This gave the authorised numbers of personnel, transport and weapons for the unit at full strength and in all cases is derived from copies of the original documents. Where they are available details of officially authorised Changes are also included.
All files in the below links are in PDF. The entries for January 1944 and November 1944 are updates of the version for September 1943, incorporating amendments to ranks, personnel and radio equipment.