Rosies of the North: They raised children, baked cakes... and built world-class fighter planes. Sixty years ago, thousands of women from Thunder Bay and the Prairies donned trousers, packed lunch pails and took up rivet guns to participate in the greatest industrial war effort in Canadian history. Like many other factories across the country from 1939 to 1945, the shop floor at Fort William's Canadian Car and Foundry was transformed from an all-male workforce to one with forty percent female workers.