title: 31st Battalion
text: # 31st Battalion
  
  31st Battalion may refer to:
  
  * 31st Battalion, Royal Queensland Regiment, a unit of the Australian Army
  * 31st/42nd Battalion, Royal Queensland Regiment, a unit of the Australian Army
  * 2/31st Battalion (Australia), a unit of the Australian Army that was raised during World War II
  * 31st (Alberta) Battalion, CEF, a unit of the Canadian Army
  * 31st Infantry Battalion (Estonia), a unit of the Estonian Army
  * 31st Engineer Battalion, a unit of the United States Army
  * Combat Logistics Battalion 31, a unit of the United States Marine Corps
  