Portuguese Court in Brazil

We are quite used to the story of European nations going out and violently conquering peacefully incorporating territories all over the world as colonies, stealing all of their resources bringing great new technologies to pitiful slums underdeveloped locales, and raping and pillaging befriending the hedonistic savages friendly indigenous communities while enslaving them economically allowing them to participate in the wonderful mercantilist system of the land of jerkfaces motherland. But has there ever been a time where the colony becomes the the motherland, and rules over the entire empire? Surprisingly, yes! Unsurprisingly, it's all thanks to Napoleon!

Fig.1: Queen Maria I of Portugal...with a 
blunt object! Run!

In 1807, Napoleon decided to invade Portugal because a) they had been traditional allies of the United Kingdom, and Napoleon hated everything British (he would automatically change the channel if Doctor Who came on, which, yes, even aired as early as the 19th century), and b) he really just enjoyed invading places, and how hard could Portugal be to take over? Even Portugal knew they wouldn't be that hard to take over, so immediately after Napoleonic French and allied Spanish troops crossed the border, the House of Braganza, the royal family of Portugal, hatched a plan. The regnant of Portugal was Queen Maria I (fig.1), who was at first labeled Maria the Pious, but eventually came to be known as Maria the Mad after reports that she always heard screaming in her head, talked to her dead husband when the room was empty, and claimed that Return of the Jedi was the superior chapter of the original trilogy. As such, her son and heir-apparent, John VI, ruled in her name beginning in 1799. Thus, it was up to him to put together a plan as Napoleon's crack troops marched closer and closer to the capital of Lisbon, and what he came up with was a rather simple idea. Bail!