6th Cavalry
- 6th Arkansas Cavalry Battalion
- 6th Arkansas Cavalry Regiment
- 6th Cavalry Brigade (Australia)
- 6th Cavalry Brigade (Poland)
- 6th Cavalry Brigade (United Kingdom)
- 6th Cavalry Division (German Empire)
- 6th Cavalry Regiment (United States)
- 6th Indian Cavalry Brigade
- 6th King Edward's Own Cavalry
- 6th Michigan Volunteer Cavalry Regiment
- 6th Missouri Volunteer Cavalry
- 6th New York Cavalry Regiment
- 6th Ohio Cavalry
- 6th Pennsylvania Cavalry
- 6th Regiment Alabama Cavalry
- 6th Regiment Illinois Volunteer Cavalry
- 6th Regiment Indiana Cavalry
- 6th Regiment Iowa Volunteer Cavalry
- 6th Regiment Kansas Volunteer Cavalry
- 6th Regiment Kentucky Volunteer Cavalry
- 6th Regiment South Carolina Cavalry
- 6th Regiment Tennessee Volunteer Cavalry
- 6th Virginia Cavalry
- VI Cavalry Corps (German Empire)
- VI Cavalry Corps (Grande Armée)