The first division to be trained at the camp was the
102d Infantry Division. Cadre personnel of the 102nd Infantry arrived at Camp Maxey on 1 September 1942, and the post was formally activated on 15 September 1942, under Major General
John B. Anderson. The 102nd Infantry Division before the war was a National Guard infantry unit from Missouri and Kansas that formed in 1921 and was nicknamed the "Ozark Division". Nationwide military enlistment greatly expanded throughout 1942 in response to US troops departing for combat action in the Pacific and European theaters. Young men from throughout the United States filled the 102nd Infantry Division's ranked and arrived for training at Camp Maxey. Trainloads of draftees began arriving and the division began to grow to its authorized strength of 40,000. The field training of the draftees consisted of a variety of infantry exercises spread over the reservation's 70,000 acres. The varied terrain provided facilities for working out problems of infantry training to meet modern battle conditions. An artillery range, obstacle course, infiltration course, and "German village" were included in training maneuvers. In an era before electronic targets, camp designers used an ingenious arrangement of ropes and pulleys to pop silhouette targets up in windows and doorways to add authenticity and realism to the village training area. The camp's obstacle course used challenging barbed-wire barriers and small dynamite charges to simulate artillery explosions. In March 1943, command of Camp Maxey administration was passed to Colonel Robert O. Annin, who remained there for the duration of the war. In late 1943, the 102nd Division departed after one year at Camp Maxey, moving to Louisiana for maneuvers before being sent into action in France shortly after the Normandy Invasion. Major General Anderson remained at Camp Maxey to command Tenth Corps Headquarters. In November 1943, the
99th Infantry Division, nicknamed the "Checkerboard Division", arrived at Camp Maxey under the command of Major General
Walter E. Lauer. The 99th Infantry Division trained at Camp Maxey until September 1944 and was sent into action in the European Theatre. In addition to training the 102nd Infantry and 99th Infantry, Camp Maxey hosted other military units from 1942 through 1945, including: 9th Headquarters, 3rd (later 4th) Army Special Troops, Army Service Forces Replacement Training Center (ROTC students from a five-state area), Tenth Corps Headquarters, 1882nd (local administration for the Eighth Service Command), Regional Hospital and Reconditioning Annex, Infantry Advance Replacement Training Center (15-week basic training for replacement troops to existing divisions after October 1944), and Regional Troops Separation Point (at the end of the war after 15 September 1945). Other nondivisional units trained at Camp Maxey including artillery (250th Field Artillery who fired the one-millionth round of World War II on 29 January 1945), and associated reconnaissance aircraft, tanks, tank destroyers, cavalry, ordinance, quartermaster, signal corps, engineers, medics, and military police (793rd Military Police Battalion was activated at Camp Maxey on 26 December 1942. The battalion stayed at Camp Maxey until February 1944, when they departed for Scotland to train for the invasion of France). == Camp Maxey as a prisoner of war camp ==