Once upon a time Irish-Americans thought it would be a good idea to invade Canada from the US. It did not go well.
CORRECTION: Andrew Johnson*
EDIT: I meant David Fincher
Sources:
https://www.warmuseum.ca/cwm/exhibitions/chrono/1774fenian_e.html
https://www.military.com/undertheradar/2019/03/15/civil-war-vets-wanted-invade-canada-liberate-ireland.html
https://www.archives.gov.on.ca/en/explore/online/fenians/index.aspx
https://www.jstor.org/stable/24778340
https://www.militaryhistoryonline.com/Century19th/FenianRaids
https://www.historynet.com/fenian-raids-invasions-of-british-ruled-canada/
