Battery B, 1–142nd was deployed to Iraq in November 2005 after completing its required three months of training for deployment in Fort Lewis, Washington. Upon deployment, Battery B, 1–142nd were attached to the 43rd Military Police Brigade then came under the command of the 16th Airborne Brigade during the latter months of deployment. Battery B was sent to FOB Grizzly (Ashraf) to conduct FOB essential missions such as convoy escort, area security patrols, desert LP/OPs, and TCP/ECP. In January 2006 Battery B, 1–142nd was assigned to the infamous prison at FOB Abu Ghraib, leaving behind its 3rd platoon in FOB Grizzly to conduct convoy escorts. In May 2006 3rd platoon rejoined the rest of the battery in Abu Ghraib after many convoy escort missions resulting in no equipment or personnel lost. In July 2006 Battery B, 1–142nd played an essential role in the closure of the prison in Abu Ghraib, the transfer of detainees to and the opening of Camp Cropper. Battery B, returned from deployment in Iraq in October 2006 with no KIAs and sustaining 4 wounded after completing many dangerous missions.  Many soldiers from Battery B were awarded CABs (Combat Action Badge) during the deployment. The Meritorious Unit Commendation for "Exceptionally Meritorious Service" during Operation Iraqi Freedom was awarded to Battery B.