The main role Dundas had during the First World War was the manufacturing of the outer casings of shells. Captain John Knowles Bertram and his cousin Lieutenant Aimers Stirling Bertram both fought in the war and neither one made it home. Captain John Knowles Bertam (December 6, 1889 – September 22 1916) is the son of Dr. Thomas A. Bertram and Jean K. Bertram and enlisted on November 13, 1914. Prior to enlisting he was an ex-cadet and had gone to the Royal Military College in Kingston. He served with the Canadian Infantry, Canadian Expeditionary Force, 20th Battalion Canadian Infantry (Central Ontario Regiment) seconded HQ 1st Canadian Infantry Brigade. Captain James Knowles Bertram was killed in action at the Battle of the Somme at the age of 26. Lieutenant Aimers Stirling Bertam (August 20, 1888 – July 20, 1917) had completed an engineering degree in April 1912 from Queen's university. He is the son of Henry and Jennie Bertram. On April 25, 1916 he enlisted and served with the 58th Battalion of the Canadian Infantry (Central Ontario Regiment). On June 28, 1917 he was severely wounded in the arm and leg and was reported to be doing well but while having surgery on his leg in London, he died at the age of 28.