How historically accurate is Braveheart

Braveheart was a very popular movie in 1995 that featured Mel Gibson playing the role of William Wallace, a Scottish knight who became a hero in the Scottish rebellions against the English in the late 13th and early 14th century. The significance of the movie is it helped to inspire Scottish national pride while also, to some, represent an early, Medieval warrior who fought for freedom for himself and his people. While much of the story depicted did occur, including the English occupation of Scotland during the time of Edward I, king of England, the depiction of the revolt against the English and other events do not correspond well to historical accounts