The History of the 71st Infantry Division:
Activated July 15, 1943. Camp Carson, Colorado, with the artillery components made up of the mountain artillery units of the 601st, 602nd, 604th, and 605th FA Bns. and their mules, already stationed at Camp Carson and were later reorganized as the 607th, 608th, 609th FA Bns. These also cadred some of the 10th Mountain Division artillery at Camp Hale, Colorado. The historic and legendary 5th and 14th Infantry regiments along with the 66th infantry regiment which now has legends in its own right, made up most of the personnel.
Organized as a light division with 9,000 personnel and 1800 mules -- as a mountain division, transportation being the army mule with 75mm howitzers, schooled in mountain and jungle warfare. No motorized vehicles. Manuevered against the 89th Division in Hunter-Liggett Military Reservation near Camp Roberts, Californina.
In June,1944, reorganized as a mechanized triangular infantry division with 15,700 personnel. Infantry regiments increased from 2,075 to 3,350 and the artillery three artillery battalions swapped their 75mm howitzers for the larger 105mm howitzers and picked up the 564th FA Bn, which had 155mm guns. This conversion took place in Fort Benning, Georgia .
Deactivated March 11, 1946, Camp Kilmer, New Jersey
Source:
http://www.geocities.com/Heartland/Valley/4020/71st.html