XII Corps
- 12 Squadron (disambiguation)
- 12th Army (disambiguation)
- 12th Army Corps (France)
- 12th Army Corps (disambiguation)
- 12th Battalion (disambiguation)
- 12th Brigade (disambiguation)
- 12th Division (disambiguation)
- 12th Group (disambiguation)
- 12th Regiment (disambiguation)
- 12th Rifle Corps
- List of military corps by number
- XII (1st Royal Saxon) Corps
- XII (Royal Saxon) Reserve Corps
- XII Army Corps (Wehrmacht)
- XII Corps (Grande Armée)
- XII Corps (India)
- XII Corps (North Korea)
- XII Corps (Ottoman Empire)
- XII Corps (Pakistan)
- XII Corps (Union Army)
- XII Corps (United Kingdom)
- XII Corps (United States)