The operation Military_operation , known as Dragon Fire East , included Cause_to_be_included approximately 2,000 U.S. Army soldiers from the 4th Infantry Brigade Combat Hostile_encounter Team , 1st Infantry Division and 3rd Stryker Brigade Combat Hostile_encounter Team , 2nd Infantry Division .

The operation Military_operation was launched Process_start on 29 July 2008 by elements of at least three Iraqi Army divisions , with four U.S. armored cavalry squadrons from the 3rd Armored Cavalry Regiment and the 2nd Stryker Cavalry Regiment in support .