Established - July 10, 1940 at Fort Knox, Kentucky. http://www.knox.army.mil/IMA/sites/about/history.asphttp://www-cgsc.army.mil/carl/resources/csi/gorman/gorman.asp#A-1
Change of command - November, 1940 - Maj. Gen. Charles L. Scott assumes commandhttp://en.wikipedia.org/wiki/US_2nd_Armored_Division
Change of command - January, 1942 - then Maj. Gen. George S. Patton assumes commandhttp://www.airpower.maxwell.af.mil/airchronicles/cc/decker.htmlhttp://www-cgsc.army.mil/carl/resources/csi/gorman/gorman.asp#II-25http://www.af.mil/bios/bio.asp?bioID=7285
Training - March, 1942 - Maj. Gen. Patton arrives in California to setup Desert Training Centerhttp://www-cgsc.army.mil/carl/resources/csi/gorman/gorman.asp#II-25
Change of command - March 4, 1943 Patton reassigned to command II Corps after Maj. Gen. Lloyd Fredendall is relieved following the loss at the Battle of Kasserine Passhttp://www.historyinfilm.com/patton/timeline.htmhttp://www-cgsc.army.mil/carl/resources/csi/Berlin2/BERLIN2.asp
Change of command - April 15, 1943 now Lt. Gen. Patton resumes commandhttp://historicaltextarchive.com/sections.php?op=viewarticle&artid=202
Subordinate units
9th Inf Div - May, 1943http://www.lonesentry.com/gi_stories_booklets/9thinfantry/index.html