Third Cavalry

3rd Cavalry, 3d Cavalry, Third Cavalry are cavalry unit designations

• 3d Armored Cavalry Regiment, a regiment of the United States Army that dates back to May 1845
• 3rd Cavalry, a 1922 regular cavalry Regiment in the British Indian Army
• 3rd Cavalry Division (United Kingdom), a division of the British Army in the First World War
• 3rd Madras Cavalry, a prior name of the British Indian Army's 7th Light Cavalry
• 3rd Cavalry Division (United States), created from the perceived need for additional cavalry units in the interwar period, existing from 1927 to 1940
• IJA 3rd Cavalry Brigade, Imperial Japanese Army brigade formed in April 1909
• 3rd/4th Cavalry Regiment (Australia), an armoured regiment of the Australian Army, and third in seniority in the Royal Australian Armoured Corps
• 3rd Brigade Combat Team, 1st Cavalry Division, a combined arms armored Brigade of the 1st Cavalry Division
• Third Colorado Cavalry, a US group formed in the mid-1860s
• 3rd Arkansas Cavalry, a Confederate Army cavalry regiment from Arkansas during the American Civil War
• 3rd Wisconsin Cavalry, a cavalry regiment that served in the Union Army during the American Civil War
• 3rd Regiment Indiana Cavalry, a military unit from the U.S. state of Indiana that participated in the American Civil War
• 3rd Regiment Illinois Volunteer Cavalry, a cavalry regiment that served in the Union Army during the American Civil War
• 3rd Regiment Iowa Volunteer Cavalry, a cavalry regiment that served in the Union Army during the American Civil War
• 3rd Michigan Volunteer Cavalry Regiment, an cavalry regiment that served in the Union Army during the American Civil War
• 3rd West Virginia Volunteer Cavalry Regiment, a cavalry regiment that served in the Union Army during the American Civil War