In September 2021, troops from the division's 1st Stryker Brigade Combat Team deployed to Erbil Air Base in Iraq following base closures for Operation Inherent Resolve. Operation Freedom's Sentinel In October 2015, the US Army announced that 1,000 troops from 4th Infantry Division's Combat Aviation Brigade would be sent to Afghanistan sometime in winter, with another 1,800 soldiers from the 4th ID's 2nd Infantry Brigade Combat Team deploying to Afghanistan in the spring 2016. On 12 August 2016, a U.S. Soldier from 1st Battalion, 12th Infantry Regiment, 2nd Brigade Combat Team, 4th ID died from a noncombat-related injury in Kandahar. Operation Atlantic Resolve On 3 November 2016, the U.S. Army deployed some 4,000 soldiers from 3rd Armored Brigade Combat Team to Europe in winter in support of Operation Atlantic Resolve - to help deter possible Russian aggression. The brigade will arrive in Poland and will fan out across the continent, one battalion with M1 Abrams tanks will cover the Baltic region of Estonia and Latvia, while another will operate in Germany. A mechanised infantry battalion with M2 Bradley troop carriers and M1 Abrams tanks will have a foothold in the Romanian and Bulgarian region, whilst Brigade headquarters will remain in Poland, along with an armoured cavalry unit and a field artillery battalion wielding self-propelled M109 Paladin howitzers. List of Commanders List of commanders of 4th Infantry Division (United States) Current structure The 4th Infantry Division consists of a division headquarters battalion, three brigade combat teams (two Stryker and one armored), a division artillery, a combat aviation brigade, and a division sustainment brigade: 4th Infantry Division (Fort Carson, Colorado) Division Headquarters and Headquarters Battalion 1st Stryker Brigade Combat Team (Raiders) Brigade Headquarters and Headquarters Company 2nd Squadron, 1st Cavalry Regiment (1st Regiment of Dragoons) 1st Battalion, 38th Infantry Regiment (Rock of the Marne) 2nd Battalion, 23rd Infantry Regiment (Tomahawks) 4th Battalion, 9th Infantry Regiment (Manchu) 2nd Battalion, 12th Field Artillery Regiment (Viking) 299th Brigade Engineer Battalion 4th Brigade Support Battalion (Packhorse) 2nd Stryker Brigade Combat Team (Mountain Warrior) Brigade Headquarters and Headquarters Company (Mountain GOAT) 3rd Squadron, 61st Cavalry Regiment (Destroyers) 1st Battalion, 12th Infantry Regiment (Red Warriors) 2nd Battalion, 12th Infantry Regiment (Lethal Warriors) 1st Battalion, 41st Infantry Regiment (Straight and Stalwart) 2nd Battalion, 77th Field Artillery Regiment (Steel) 52nd Brigade Engineer Battalion (Patriots) 704th Brigade Support Battalion (Blacksmiths) 3rd Armored Brigade Combat Team (Iron) Brigade Headquarters and Headquarters Company