http://en.wikipedia.org/wiki/History_of_cannon http://en.wikipedia.org/wiki/History_of_cannon http://en.wikipedia.org/wiki/History_of_cannon http://en.wikipedia.org/wiki/History_of_cannon http://en.wikipedia.org/wiki/History_of_cannon cannon was around 1288 en.wikipedia.org http://en.wikipedia.org/wiki/History_of_cannon http://en.wikipedia.org/wiki/History_of_cannon view article