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The 3rd Brigade, 1st Cavalry Division, was first constituted on 29 August 1917. It was organized in December 1917 as headquarters, 3rd Cavalry Brigade, and an element of the 15th Cavalry division. The Brigade demobilized on 15 July 1919.
The Brigade was reconstituted on 10 august 1921, joining the newly constituted 1st Cavalry Division. The Brigade was converted and re-designated as Headquarters and Headquarters Company, 9th Armored Division Trains, and the unit deployed to the European theater where it received campaign participation credit for the operations in Rhineland, Ardennes Alsace, and Central Europe. The unit was awarded two Meritorious Unit Commendations with streamers embroidered Europe 1944 and Europe 1945.
Following World War II, the unit returned to the United States and was inactivated. It remained inactive until 15 July 1963, when it was relieved from assignment to the 9th Armored Division, converted, and re-designated as Headquarters and Headquarters Company, 3rd Brigade, 1st Cavalry Division.
The Brigade was activated on 1 September 1963, with the Division on station in Korea at the Demilitarized Zone. In July 1965, the Division moved to Fort Benning, Georgia and underwent reorganization as an Airmobile Unit. The Brigade sailed from Charleston, South Carolina, to Quo Nhon, Republic of Vietnam, on 17 September 1965. The first major action undertaken by the Brigade began on 10 October 1965, and was followed by participation in the Ia Drang Valley operation known as the Pleiku Campaign. For its exceptional performance in the campaign, the Brigade shares with the Division a Presidential Unit Citation. In 1966 and 1967, the 3rd Brigade participated in a variety of operations, including clearing the An Lap Basin.
The 3rd Brigade was formed into a separate unit and assumed
operational control of the old 1st Cavalry Division area of
operations on 10 April 1971. Finally in 1972, the Brigade left
Vietnam for Fort Hood, Texas, to rejoin the 1st Cavalry
Division. When its colors arrived at Fort Hood on 29 June 1972,
the unit officially became the “GREYWOLF” Brigade. The Brigade
underwent a change from an Airmobile configuration to an
Infantry Heavy Brigade. The “GREYWOLF” Brigade remained with the
Division until its inactivation in 1980. It remained on the
inactive roles until 21 May 1991, when the 1st “Tiger” Brigade,
2nd Armored Division was re-designated as the 3rd “GREYWOLF”
Brigade, 1st Cavalry Division.
In support of Operation Iraqi Freedom II, the Brigade returned to the Middle East in 2004 to the capital city of Baghdad with responsibility for the security of the “International Zone”. The Brigade conducted combat operations in the violent Haifa Street neighborhood during the beginning of the insurgency in Iraq, setting the security conditions to conduct the first free national Iraqi elections within that critical area.
The GREYWOLF Brigade deployed again to Iraq in 2007 in support of Operation Iraqi Freedom 06-08. The Brigade was responsible for the Diyala Province and the capital city of Baqubah and conducted operations in the Salah ah Din Province. The GREYWOLF Brigade was responsible for defeating al Qaeda in Baqubah along with the restoration of stability and civil services throughout the Diyala Province.
The GREYWOLF Brigade deployed to Iraq for a third time in
December 2008. Responsible for the Ninewa Province in northern
Iraq, the Brigade conducted full-spectrum operations to
neutralize AQI and Irreconcilable Elements to improve security,
stimulate economic growth and create enduring stability. In
accordance with the Security Agreement, the GREYWOLF BDE moved
operations outside of cities and transitioned security primacy
within Mosul and Tal Afar to the Iraqi Security Forces. The
Brigade continued to conduct full-spectrum operations outside of
Mosul to prevent insurgents from using the Mosul Belts as
support zones to conduct attacks within the city, setting the
conditions for Iraq’s National Elections.