Scotland is totally different. Braveheart is set during the reign of Edward I, at the time England and Scotland were two separate counties, there had always been raids from both sides. It was about one country asserting its dominance over the other.
Edward ruled from 1272 to 1307. James VI of Scotland also became king of England following the death of Elizabeth I. That was 1603, three hundred years later.
Even though they both had the same monarch England and Scotland were separate countries until the Act of Union. At the time Scotland was bankrupt and England bailed it out.
You don't need to be an expert to read a Wikipedia page and educate yourself. Don't rely on Hollywood, Braveheart is full of historical inaccuracies, chief being that William Wallace didn't have an Australian accent.