Special Troops Battalion , 3rd Brigade Combat Team , 10th Mountain Division ( United States ) The Special Troops Battalion , 3rd Brigade Combat Team ( BCT ) , 10th Mountain Division is a special troops battalion of the United States Army headquartered at Fort Drum , New York . It is the organization for the command elements of the 3rd Brigade Combat Team , 10th Mountain Division . The battalion contains the brigade ' s senior command structure , including its Headquarters and Headquarters Company ( HHC ) , as well as military police , engineering , intelligence , and communications elements . Organization . The Special Troops Battalion ( BSTB ) is a subordinate battalion of the 3rd BCT , 10th Mountain Division , and is a permanent formation of the brigade ; additionally , the BCT ' s command elements are contained within the BSTB . The battalion consists of five companies ; both the brigade ' s and the battalion ' s HHCs , as well as Alpha Company , a combat engineer company ; Bravo Company , a military intelligence company ; Charlie Company , a communications company ; and a military police ( MP ) platoon incorporated into the battalion HHC . These companies provide combat support functions for the maneuver battalions of the BCT . As such , all of the formations are mountain warfare qualified . History . Upon the return of the division headquarters and 1st Brigade from a deployment to Afghanistan , the 10th Mountain Division began the process of transformation into a modular division . On 16 September 2004 , the division headquarters finished its transformation . The 1st Brigade became the 1st Brigade Combat Team , while the 3rd Brigade Combat Team , 10th Mountain Division was activated for the first time . In January 2005 , the 4th Brigade Combat Team , 10th Mountain Division was activated at Fort Polk , Louisiana . 2nd Brigade Combat Team would not be transformed until September 2005 , pending a deployment to Iraq . Recent deployments . The division headquarters and 3rd Brigade Combat Team redeployed to Afghanistan in February 2006 , staying in the country until June 2007 . The division and brigade served in the eastern region of the country , along the border with Pakistan , fulfilling a similar role as it did during its previous deployment . Prior to the end of its twelve - month deployment cycle , the brigade was extended for an additional four months , in the end serving a sixteen - month tour ; it was eventually replaced by the 173rd Airborne Brigade Combat Team which was rerouted from Iraq . After a one - year rest , the headquarters of the 10th Mountain Division was deployed to Iraq for the first time in April 2008 , along with the 4th Brigade Combat Team . The division headquarters served as the command element for southern Baghdad , while the 4th BCT operated in North Baghdad . The 10th Mountain participated in larger scale operations such as Operation Phantom Phoenix . The 3rd Brigade Combat Team was slated to deploy to Iraq in 2009 , but that deployment was rerouted . In January 2009 , the 3rd BCT instead deployed to Logar and Wardak , Nangargar and Kunar Provinces in eastern Afghanistan to relieve the 101st Airborne Division , as part of a new buildup of US forces in that country . The brigade was responsible for expanding Forward Operating Bases in the region , as well as strengthening US military presence in the region in preparation for additional US forces to arrive .