The 2nd Advise and Assist Brigade, 1st Cavalry Division (The Black Jack Brigade) is a cavalry

Cavalry

Cavalry or horsemen were soldiers or warriors who fought mounted on horseback. Cavalry were historically the third oldest and the most mobile of the combat arms...

 unit of the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

 based in Fort Hood, Texas

Fort Hood, Texas

Fort Hood is a United States military post located outside of Killeen, Texas. The post is named after Confederate General John Bell Hood. It islocated halfway between Austin and Waco, about from each, within the U.S. state of Texas....

 and is currently serving in Iraq as of May 2011.

• 5th Cavalry Regiment
• 8th Cavalry Regiment
• 9th Cavalry Regiment
• 82nd Field Artillery Regiment
  82nd Field Artillery Regiment (United States)
  - Foundation and Formation :The 82nd Field Artillery traces it earliest history to that of the "First Dragoons". This type of fighting force was unique employing a fighting force that was skilled both as horse mounted and dismounted troops. Dragoon is derivitave from the French Army designation...
  
  
• 15th BSB
• 2nd BSTB

The history of the 2nd “Black Jack” Brigade, 1st Cavalry Division can be traced to 29 August 1917, when it was first constituted in the Regular Army as Headquarters, 2nd Cavalry Brigade.