71st Regiment
- 71 (Yeomanry) Signal Regiment
- 71st (Highland) Regiment of Foot
- 71st Air Defense Artillery Regiment (United States)
- 71st Cavalry Regiment (United States)
- 71st Coorg Rifles
- 71st Illinois Volunteer Infantry Regiment
- 71st Infantry Regiment (Greece)
- 71st Infantry Regiment (New York)
- 71st Infantry Regiment (United States)
- 71st Ohio Infantry
- 71st Pennsylvania Infantry
- 71st Regiment of Foot (1758)
- 71st Regiment of Foot, Fraser's Highlanders
- 71st United States Colored Infantry Regiment
- British Army
- British Indian Army
- Hellenic Army
- New York State Guard
- US Army