21st Regiment

21st Regiment may refer to:

Infantry regiments 21 Special Air Service Regiment (Artists) (Reserve), a unit of the British Army 21st Foot, a former regiment of the British Army 21st Infantry Regiment (Thailand), a unit of the Royal Thai Army 21st Infantry Regiment (United States), a unit of the United States Army 21st Punjabis, a unit of the British Indian Army 21st Marine Infantry Regiment, a unit of the French Marines 21st Marine Regiment (United States), a unit of the United States Marine Corps

American Revolutionary War regiments

21st Continental Regiment

American Civil War regiments

21st Iowa Infantry Regiment 21st Illinois Infantry Regiment 21st Maine Infantry Regiment 21st Michigan Infantry Regiment 21st Mississippi Infantry Regiment 21st Ohio Infantry Regiment 21st Kansas Militia Infantry Regiment 21st Kentucky Infantry Regiment 21st Massachusetts Infantry Regiment 21st Wisconsin Infantry Regiment

Cavalry regiments 21st Lancers, a unit of the British Army

Engineer regiments

21st Construction Regiment (Australia), a former unit of the Australian Army's Engineers 21 Engineer Regiment (United Kingdom), a unit of the British Army's Royal Engineers

21st Regiment

Bron en licentie