The 3d Armored Cavalry Regiment is a regiment of the United States Army currently stationed at Fort Hood, TX. The Regiment has a history in the United States Army that dates back to May 19, 1846, when it was Constituted in the Regular Army as the Regiment of Mounted Riflemen at Jefferson Barracks, Missouri. This unit was reorganized at the start of the American Civil War as the 3rd U.S. Cavalry Regiment on August 3, 1861. Today, "3rd" has been replaced by the designator "3d" in the regiment's title, and the word "armored" has been added to recognize it as a heavy cavalry regiment (equipped with M1 Abrams tanks and M3 Bradley cavalry fighting vehicles) Under various names it has seen action during ten major conflicts: the Indian Wars, the Mexican-American War, the American Civil War, the Spanish-American War, the Philippine-American War, World War I, World War II, the Persian Gulf War, SFOR in Bosnia, and Operation Iraqi Freedom.