consist of the 1st, 2d, and 3d Battalions, elements of the 33d Infantry Division Reorganized 1 February 1968 to consist of the 2d Battalion, an element of the 33d Infantry Brigade Redesignated 1 May 1972 as the 122d Field Artillery Withdrawn 5 February 1987 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System Reorganized 1 September 1996 to consist of the 2d Battalion, an element of the 34th Infantry Division Reorganized 1 October 1997 to consist of the 2d Battalion, an element of the 35th Infantry Division Ordered into active Federal service 16 November 2003 at home stations; released from active Federal service 13 May 2005 and reverted to state control Redesignated 1 October 2005 as the 122d Field Artillery Regiment Relieved 1 September 2006 from assignment to the 35th Infantry Division and assigned to the 33d Infantry Brigade Combat Team Ordered into active Federal service 2 October 2008 at home stations; released from active Federal service 5 November 2009 and reverted to state control ANNEX Constituted 1 July 1897 in the Illinois National Guard as a squadron of cavalry and organized from existing elements Expanded, reorganized, and mustered into Federal service 21 May 1898 at Springfield as the 1st Illinois Volunteer Cavalry; mustered out of Federal service 11 October 1898 at Fort Sheridan, Illinois Reorganized in 1899 in the Illinois National Guard as a squadron of cavalry. Expanded, reorganized, and redesignated 22 June 1899 as the 1st Cavalry Mustered into Federal service 27 June 1916; mustered out of Federal service 17 November 1916 at Fort Sheridan, Illinois. Chicago elements of the regiment converted and redesignated 9 June 1917 as the 2d Field Artillery (non-Chicago elements converted and redesignated 24 June 1917 as the 3d Field Artillery – hereafter separate lineage) Field Artillery drafted into Federal service 5 August 1917 Reorganized and redesignated 21 September 1917 as the 122d Field Artillery and assigned to the 33d Division Demobilized 7–8 June 1919 at Camp Grant, Illinois Reorganized 11 November 1921 in the Illinois National Guard at Chicago as the 1st Field Artillery Redesignated 13 September 1921 as the 122d Field Artillery and assigned to the 33d Division Inducted into Federal service 5 March 1941 at Chicago Regiment broken up 12 February 1942 and its elements reorganized and redesignated as follows: Headquarters and Headquarters Battery disbanded 1st Battalion as the 122d Field Artillery Battalion, an element