(The 31st "Alberta" Battalion, CEF was raised as one of the four fighting battalions destined for the 6th Brigade, 2nd Division Canadian Expeditionary Force, on 15 March 1915. The battalion commander until late in the war was Lieutenant-Colonel Arthur Henry Bell of Calgary.

On 17 May 1915, the battalion sailed for England on the RMS Carpathia, with a complement of 36 officers and 1033 other ranks.

After initial training in England, the battalion fought in Belgium and France, and was often at the forefront of the fighting at St. Eloi Craters, the Ypres Salient, Vimy Ridge (Thélus Village), Fresnoy, the Somme, Passchendaele Village, the Battle of Amiens, the Battle of Arras, Drocourt-Quéant Switch, Valenciennes, Mons, and the occupation of the Rhine.

The bulk of the battalion returned to Canada on the SS Cedric on 27 May 1919, and to Calgary on 1 June 1919. Through the course of World War I, the 31st Battalion suffered losses of 941 dead, and an additional 2,312 non-fatal casualties.

A total of 4,487 men served in the battalion. The 31st Canadian Infantry Battalion CEF was disbanded on 15 September 1920)