1775: "Quebec's fortifications were more than strong enough to hold off
an enemy that lacked a single cannon large enough to damage the city
walls." [1]
1812: "The offensive actions of the United States failed in every
attempt to capture Canada." [2]
In the latter case we kicked you asses all the way back to Washington
and burned down the Whitehouse for good measure.
[1] http://www.civilization.ca/cwm/expo/background_e.html
[2] http://www.multied.com/1812/
With the minor exceptions of EVERY WAR EVER FOUGHT BETWEEN CANADA AND