A few years ago I came across an article on Historynet.com on the Fenian raids in Canada. An Irish-American brigade invaded Canada in hopes of creating a free Irish state. Sometimes truth is stranger than fiction!
Since reading this article I haven't been able to find much else on the subject...until now! Fiery Dragon has created a boardgame on the subject! Check it out here!
This is just screaming "Here's an idea for some Victorian/Sci-Fi/Colonial gaming ideas!"