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The war on the water was an essential, if not the most important, aspect of the WAR OF 1812. Great Britain was obviously at a disadvantage geographically when trying to defend its colony Canada in a conflict with the United States.

Dominion Arsenal, the first government cartridge and shell factory and proofing facility, established 1882 at Québec to provide the Canadian Militia with ammunition.

Military aviation began with the use of balloons for observation as early as 1794, during the French Revolution.

Before the Second World War, the British government was anxious to acquire new, secure sources for weapons production. The Canadian government was reluctant to co-operate, fearing isolationist opinion, especially in Québec.

HMCS ​Chicoutimi is one of four used submarines Canada purchased from Britain in the late 1990s.

A corvette was a small, lightly armed Canadian warship used for anti-submarine warfare in the Second World War. With the convoys of the North Atlantic under siege by German U-Boats in the early years of the war, Canada needed to

Land mines, used in zones of conflict to prevent access, are containers filled with explosives. Usually camouflaged or hidden, the devices maim and even kill when detonated by their unsuspecting victims. Land mines are small, inexpensive and easy to deploy.

Radio waves are part of the electromagnetic spectrum, as is visible light. H.R. Hertz provided practical demonstration of Maxwell's theory and, in 1888, actually performed radio-wave-reflection experiments.

In the early 20th Century, the Ross rifle, a Canadian-made infantry weapon, was produced as an alternative to the British-made Lee-Enfield rifle.