In the First World War several batteries of artillery were raised in Montreal and the 2nd Brigade included the 3rd Montreal Battery amongst its four batteries. During the war, the unit took part in every action of the 1st Canadian Division and later on the Canadian Corps. In a series of reorganizations the battery was renamed the 7th Field Battery, the name it continues to hold. This battery was commanded at the outbreak of the war by Major Andrew McNaughton. Wounded at the 2nd Battle of Ypres, he went on to command the Canadian Corps Heavy Artillery and, in the Second World War, the First Canadian Army. The 2nd Brigade served in the divisional artillery of the 1st Canadian Division for the duration of the war.