1st Cavalry

• 1st (Risalpur) Cavalry Brigade
• 1st (Silesian) Life Cuirassiers "Great Elector"
• 1st Air Cavalry Brigade, 1st Cavalry Division (United States)
• 1st Arkansas Cavalry Regiment (Crawford's)
• 1st Arkansas Cavalry Regiment (Dobbin's)
• 1st Arkansas Cavalry Regiment (Monroe's)
• 1st Battalion, Georgia Cavalry
• 1st California Cavalry Battalion
• 1st California Cavalry Regiment
• 1st Cavalry Army
• 1st Cavalry Brigade (Australia)
• 1st Cavalry Brigade (France)
• 1st Cavalry Brigade (Hungary)
• 1st Cavalry Brigade (Imperial Japanese Army)
• 1st Cavalry Brigade (Poland)
• 1st Cavalry Brigade (United Kingdom)
• 1st Cavalry Brigade (United States)
• 1st Cavalry Corps (Russian Empire)
• 1st Cavalry Division (Australia)
• 1st Cavalry Division (German Empire)
• 1st Cavalry Division (Kingdom of Yugoslavia)
• 1st Cavalry Division (Poland)
• 1st Cavalry Division (Reichswehr)
• 1st Cavalry Division (Russian Empire)
• 1st Cavalry Division (Soviet Union)
• 1st Cavalry Division (United Kingdom)
• 1st Cavalry Division (United States)
• 1st Cavalry Division (Wehrmacht)
• 1st Cavalry Division Eugenio di Savoia
• 1st Cavalry Regiment (1855)
• 1st Cavalry Regiment (Chile)
• 1st Cavalry Regiment (United States)
• 1st Cavalry Regiment, Arkansas State Troops
• 1st Colorado Cavalry Regiment
• 1st Connecticut Cavalry Regiment
• 1st Cossack Cavalry Division
• 1st Dakota Cavalry Battalion
• 1st Florida Cavalry
• 1st Florida Cavalry Regiment (Union)
• 1st Florida Special Cavalry Battalion
• 1st Foot Cavalry Division (France)
• 1st Foreign Cavalry Regiment
• 1st Georgia Cavalry
• 1st Guards Cavalry Division (Russian Empire)
• 1st Guards Uhlans
• 1st Illinois Cavalry Regiment
• 1st Indian Cavalry Division
• 1st Iowa Volunteer Cavalry Regiment
• 1st King's Mounted Rifles
• 1st Light Cavalry Division (France)
• 1st Louisiana Cavalry Regiment
• 1st Louisiana Cavalry Regiment (Union)
• 1st Maine Volunteer Cavalry Regiment
• 1st Maryland Cavalry (Union)
• 1st Mechanized Cavalry Brigade
• 1st Michigan Volunteer Cavalry Regiment
• 1st Minnesota Volunteer Cavalry Regiment
• 1st New Jersey Volunteer Cavalry
• 1st North Carolina Cavalry Regiment
• 1st Ohio Cavalry
• 1st Oregon Volunteer Cavalry Regiment
• 1st Parachute Hussar Regiment
• 1st Pennsylvania Cavalry Regiment
• 1st Polish Light Cavalry Regiment of the Imperial Guard
• 1st Regiment Alabama Cavalry (Union)
• 1st Regiment Alabama Volunteer Cavalry (Confederate)
• 1st Regiment Arkansas Cavalry (Union)
• 1st Regiment Maryland Volunteer Cavalry
• 1st Regiment Nebraska Volunteer Cavalry
• 1st Rhode Island Cavalry
• 1st Royal Bavarian Chevau-légers "Emperor Nicholas of Russia"
• 1st Royal Bavarian Heavy Cavalry (Prince Charles of Bavaria's)
• 1st Royal Bavarian Uhlans "Emperor William II, King of Prussia"
• 1st Royal Saxon Guards Heavy Cavalry
• 1st Spahi Regiment
• 1st Texas Cavalry Regiment (Union)
• 1st United States Volunteer Cavalry
• 1st Vermont Cavalry
• 1st Virginia Cavalry
• 1st West Virginia Volunteer Cavalry Regiment
• 1st Wisconsin Volunteer Cavalry Regiment
• I Cavalry Corps (German Empire)
• I Cavalry Corps (Grande Armée)