- Source: 12th Regiment
- Andrew O. Apple
- 9th/12th Royal Lancers
- King's Royal Rifle Corps
- Pertempuran Mogadishu (1993)
- Brigade 3 Australia
- Luther Kaltenbach
- Pertempuran Bersyeba
- Pertempuran Gaza Ketiga
- Kebuntuan di Palestina Selatan
- Perang Britania Raya-Irak
- 12th Regiment
- 12e Régiment blindé du Canada
- 12th Cavalry Regiment
- Suffolk Regiment
- 12th Marine Littoral Regiment
- 12th Royal Lancers
- 12th Infantry Regiment (United States)
- 12/13th Battalion of the Line
- 12th Frontier Force Regiment
- 8th/12th Regiment, Royal Australian Artillery
The 12th Regiment may refer to many military units.
12th Infantry Regiment (South Korea)
12th Regiment Royal Artillery
12th Infantry Regiment (Philippine Commonwealth)
12th Infantry Regiment (USAFIP-NL)
12th Infantry Regiment (United States)
12th Cavalry Regiment (United States)
12th Regiment Massachusetts Volunteer Infantry (American Civil War)
12th Armoured Regiment (Australia)
12th Armoured Regiment (India)
12th MNLA Regiment (Malayan National Liberation Army)