What were the historical facts in 'Macbeth'?

The first historical fact in the Shakespearean play 'Macbeth' was its basis in the lives of real, historical figures. For example, there really was a Macbeth [c. 1014-August 15, 1057], who ruled 17 years as King of Scotland. He really was married to Gruoch ingen Boite [b. c. 1015], who was his Lady and who had a son. He really was preceded as King by Duncan I [d. August 14, 1040], who had two sons, the subsequent Kings Malcolm III [d. November 13, 1093] and Donald III [d. 1099]. And there really was a King Edward the Confessor [c. 1003-January 5, 1066] in England. The second historical fact was the invasion of Scotland by Norwegians. The Norwegian forces really were led by King Sweno [c. 1016-1035]. They really were defeated by Scotsmen. And a commemorative stone in Forres, Scotland really has linked that defeat to Macbeth's efforts. The third historical fact was the invasion of Scotland by English forces. That invasion really did help bring about the deadly overthrow of Macbeth. And it really did help bring about the Anglicization of the lives of Scotsmen. In the play, the Anglicization was evidenced in the replacing of the Scottish title of 'thane' by the English title of 'earl'. The fourth historical fact was Macbeth's death as the result of mortal wounds in battle.