Canada crash-landed on Earth in 1643 from an unknown origin somewhere outside of our galaxy. Their Nunavut engines and Ontario navigation systems were damaged beyond immediate repair upon landing, and so the Canadians were forced to adapt to Earthen life.
To make things worse, the port wing of Newfoundland was sheared off before the crash, and the starboard wing of Alaska was quickly stolen by the Russians. The Hudson power reactor was destroyed in a devastating explosion, forcing the Canadians to fill the core with water from the Atlantic.
Things went from bad to worse quickly. The section of Earth they had landed in was too cold for their taste, and many native Canadians died from the cold. Those who adapted did so very well, quickly moving to extract the maple syrup from Canada's fuel cells, which were then sent by the Mounties on beaver and moose-back to the Earthen people in exchange for parts to repair Nunavut and Ontario.
However, at the time Earth's population was very far behind the incredible Canadian technology, and the only parts they could muster were logs, which they used to build shelters on the now frozen hull of Canada.
Soon after, Canada was invaded by Earthens calling themselves the 'English' and 'French'. While the two Earthen factions fought over control of the ship, the French soon took control of the Quebec accommodation center for passengers and crew of Canada, and the English took over the Columbia drone hangar, calling it 'British'.
In 1776, the land below Canada became the United States of America. After a brief political war with the Canadian people, they burned down America's White House. To this day, America denies such an event, declaring that the White House and even Canada didn't exist.
Today Canada enjoys a rich cultural heritage, mostly that of the crew of Canada in the years after the landing. Most of their home world technology is lost forever, but they continue to export their precious maple fuel in exchange for Earthen currency, parts and labor.
Canada now boasts vast pine forests, plenty of dramatic Canadian scenery and - frighteningly - a military force to call their own.
Canada is now ruled by Princess Jade Lassassino, who hails from the royal city of Vancouver. She cannot become queen and lead her people to glory until she is married - hopefully to Prince Fyndir from the Earthen ciy of Dublin.