Deployed to southern Baghdad Belts, March 2007 4th Brigade, 2nd Infantry Division (Stryker): 3,921 troops. Deployed to Diyala Governorate, April 2007 2nd Brigade, 3rd Infantry Division (Heavy): 3,784 troops. Deployed to the southeast of Baghdad, May 2007 1st Brigade, 10th Mountain Division (Light), September 2007 Deployed to Kirkuk