Thank you, I'll check it out.Actually, maybe watching the series Hornblower may give you some inspiration, but I have a feeling it maybe set a little later than what you are looking for.
In American-English your would use and write "cannons" and because of the internet that is becoming the accepted spelling world-wide, but in English-English "cannon" would be seen as traditional the correct word. It is like deer, sheep, fish, or aircraft, you don't add the "s". I don't know why...CupofJoe, I'ev seen in an Oxford dictionary the plural cannons (looked it up right now), can you clerify your coment? (English is my second language)