31st Regiment or 31st Infantry Regiment may refer to:
- Infantry regiments
- 31 Combat Engineer Regiment (The Elgins), a unit of the Canadian Army
- 31st Infantry Regiment (Thailand), a unit of the Royal Thai Army
- 31st Infantry Regiment (Philippine Commonwealth Army), a unit of the Philippine Commonwealth Army
- 31st (Huntingdonshire) Regiment of Foot, a unit of the United Kingdom Army
- 31st Infantry Regiment (United States), a unit of the United States Army
- Cavalry regiments
- 31st Mechanized Infantry Regiment "Asturias", a unit of the Spanish Army
- 31st Cavalry Regiment (United States), a unit of the United States Army
- Artillery regiments
- 31st Reserve Field Artillery Regiment (Ireland), a unit of the Irish Army
- Combat support regiments
- 31 (City of London) Signal Regiment, a unit of the United Kingdom Army
- American Civil War regiments
- 31st Illinois Volunteer Infantry Regiment
- 31st Iowa Volunteer Infantry Regiment
- 31st New York Volunteer Infantry Regiment
- 31st Wisconsin Volunteer Infantry Regiment
Famous quotes containing the word regiment:
“Christians would show sense if they dispatched these argumentative Scotists and pigheaded Ockhamists and undefeated Albertists along with the whole regiment of Sophists to fight the Turks and Saracens instead of sending those armies of dull-witted soldiers with whom they’ve long been carrying on war with no result.”
—Desiderius Erasmus (c. 1466–1536)