Structure 3rd Armored Cavalry (click to enlarge)[2][3]Top Left: Branch Insignia of the 3d ACR Top Right: Shoulder Sleeve Insignia of the 3d ACR Bottom Right: Distinctive Unit Insignia of the 3d ACR (nicknamed the "BUG")The 3rd Cavalry Regiment, formerly 3rd Armored Cavalry Regiment, ("Brave Rifles") is a regiment of the United States Army currently stationed at Fort Hood, TX.