The 4th Air Defense Artillery Regiment was constituted 1 June 1821 in the Regular Army as the 4th Regiment of Artillery and organized from new and existing units with headquarters at Pensacola, Florida. As a result of the division of the Artillery Corps into Coast and Field Artillery units, the Regiment was broken up 13 February 1901, and its elements reorganized and redesignated as separate numbered companies and batteries of the Artillery Corps.
The 83rd Field Artillery Regiment is a regiment of the Field Artillery Branch of the United States Army.
The 34th Armor Regiment is an armored regiment of the United States Army formed in 1941.
The 2nd Field Artillery Regiment is a field artillery regiment in the United States Army. Currently a parent regiment under the U.S. Army Regimental System, the regiment has a single active battalion, the 2nd Battalion, 2nd Field Artillery, assigned to the 428th Field Artillery Brigade at the U.S. Army Field Artillery, Fort Sill, OK. Their long history is currently represented by the 2nd Field Artillery Mascots
The 52nd Air Defense Artillery Regiment is an air defense artillery regiment of the United States Army first organized in 1917 as a railway gun unit. It continued in that role unit 1943, when the regiment was broken in separate railway gun battalions, and in the following year the units were reorganized and redesignated as field artillery.
The 5th Air Defense Artillery Regiment is an Air Defense Artillery regiment of the United States Army, first formed in 1861 in the Regular Army as the 5th Regiment of Artillery.
The 6th Field Artillery Regiment is a Field Artillery Branch regiment of the United States Army first activated in 1907 from numbered companies of artillery. It was first organized with two battalions.
The 16th Field Artillery Regiment is a field artillery regiment of the United States Army. The regiment served with the 4th Division in World War II and with the 4th and 8th Divisions between the World Wars. As the 16th Armored Field Artillery Battalion, it served with the 9th Armored Division during World War II, and with the 2nd Armored Division after the war. Designated a parent regiment under the Combat Arms Regimental system, and later the U.S. Army Regimental System, since 1957, regimental elements have served with the 1st, 2nd and 4th Armored Divisions; the 4th, 8th, and 81st Infantry Divisions; and the 1st Cavalry Division. Regimental elements have participated in combat in Vietnam, and in Operation Iraqi Freedom. The regiment currently has a single active battalion, the 3rd Battalion, 16th Field Artillery, assigned to the 2nd Brigade Combat Team, 1st Cavalry Division and stationed at Fort Hood, TX.
The 17th Field Artillery Regiment is a field artillery regiment of the United States Army first formed in 1916.
The 21st Field Artillery Regiment is a field artillery regiment of the United States Army first formed in 1916. A parent regiment under the U.S. Army Regimental System, all components of the regiment are currently inactive. The regiment's last active element, 1st Battalion 21st Field Artillery Regiment, inactivated on 12 June 2014.
The 25th Field Artillery Regiment is a field artillery regiment of the United States Army, first constituted 5 July 1918 in the National Army (USA). Although the regiment did not see action during World War I, elements participated in World War II, Vietnam, Panama, the Gulf War, and the Global War on Terrorism. Currently the regiment one active battalion, a towed light artillery units equipped with the M119A3 105mm Howitzer and the M777A2 155mm Howitzer. The 5th Battalion is assigned to the 3rd Brigade Combat Team, 10th Mountain Division at Fort Polk, Louisiana. The 4th Battalion was inactivated on 14 August 2014.
The 26th Field Artillery Regiment is a field artillery regiment of the United States Army first constituted 5 July 1918 in the National Army (USA).
The 27th Field Artillery Regiment is a field artillery regiment of the United States Army, first Constituted in 1918 in the National Army (USA).
The 30th Field Artillery Regiment is a field artillery regiment of the United States Army, first constituted in 1918 in the National Army (USA).
The 42nd Field Artillery Regiment is a field artillery regiment of the United States Army, first Constituted 5 July 1918 in the National Army (USA).
The 77th Field Artillery Regiment is a field artillery regiment of the United States Army. First constituted 1916 in the Regular Army as a cavalry regiment. Reorganized in 1917 as field artillery and given its current designation.
The 79th Field Artillery Regiment is a field artillery regiment of the United States Army. First constituted 1916 in the Regular Army.
The 43rd Air Defense Artillery Regiment is an air defense artillery regiment of the United States Army first constituted 1918 in the Regular Army.
The 333rd Field Artillery Regiment is a regiment of the Field Artillery Branch of the United States Army.
The 6th Air Defense Artillery Regiment is an air defense artillery regiment in the United States Army, first formed in 1898 as the 6th Regiment of Artillery. The 6th and 7th U.S. Artillery Regiments were constituted on 8 March 1898, three weeks after the explosion of the USS Maine in Havana, Cuba on 15 February 1898, as the United States' declaration of war on Spain and commencement of the Spanish–American War seemed imminent.
