 24 June, 1921 is another important date in Army Reserve history due to the constitution or reconstitution of organized reserve infantry divisions numbering from 76 to 104. The 86th Division was one of these, and its headquarters was located in Chicago, Illinois, with subordinate units throughout the state. It conducted AT at Camp Custer, Michigan, Fort Snelling, Minnesota, Camp Sparta, Wisconsin, and Fort Sheridan, Illinois. The 86th was called to active duty on 15 December 1942 in Texas and fought in Central Europe in World War II from 4 March to 8 May 1945. Due to its short time in Europe, it was redeployed to the United States and trained for the invasion of Japan. However, Japan surrendered before the 86th arrived, so it was sent to the Philippines in August 1945, and it inactivated there on 30 December 1946. The 86th ARCOM mobilized the 826 Ordnance Company from Madison, Wisconsin, the 482nd Medical Detachment from Aurora, Illinois, and the 377th Maintenance Company from Manitowoc, Wisconsin for service in the Republic of Vietnam in 1968 to 1969 during the Vietnam War. The 86th ARCOM also mobilized 35 units for Operation Desert Shield and Operation Desert Storm. One more important date in Army Reserve history is 15 September 1996, when all the ARCOMs inactivated, the 86th ARCOM was inactivated. The 86th returned as a training brigade for a short time and became a training division on 18 September 2010, and it is located at Fort McCoy, Wisconsin. Happy Birthday Army Reserve!