CFB Sheffield - chemical weapons test range

Canadian Forces Base Suffield (also CFB Suffield), is the largest Canadian Forces Base and the largest Commonwealth military training base.

Following the fall of Algeria to Nazi Germany, the British Army required a new training facility for carrying out experiments in chemical warfare. In 1941, the federal government expropriated the Suffield Block, purchasing the majority of the land from the Canadian Pacific Railway and the Hudson's Bay Company; 452 residents were displaced. Experimental Station Suffield commenced operations on June 11, 1941.