Nelson Charles Spencer, was a Canadian merchant, provincial politician from Alberta, and lieutenant colonel with the Canadian Expeditionary Force (CEF) during World War I.

The 31st Battalion (Alberta), CEF, was an infantry battalion of the Canadian Expeditionary Force during the Great War. The battalion recruited in Alberta and was mobilized at Calgary. The battalion was authorized in November 1914 and embarked for Britain on 17 May 1915. On 18 September 1915 it disembarked in France, where it fought with the 6th Infantry Brigade, 2nd Canadian Division in France and Flanders until the end of the war. The battalion was disbanded in August 1920.