During the period from 1914 to 1919, as a member of the British Empire (later known as the British Commonwealth), Canada established The
Canadian Expeditionary Force in support of her allies as a result of Germany's continuing aggression in Europe. With the onslaught of the
First World War, and because of his prior experience, Biggar was tasked to organize the No. 13 Field Ambulance in Victoria, British Columbia in 1916 as a component of the
4th Canadian Division. In 1917 Biggar was promoted to Quartermaster General to facilitate the war effort in an effective and efficient manner. During this war, Canada had raised a force of 600,000 in spite of its national population being only six million. Of those, 60,000 were subsequently killed. As a direct result of the heroic efforts and sacrifices made by so many Canadians, Canada won wide respect and support in becoming an independent country. In 1920 Biggar retired from the
Canadian Militia after 39 years of distinguished service for his country. He died at Toronto 19 February 1922. ==Legacy==