Macbeth was King of Scotland from 1040 until his death in 1057. Macbeth's story was fictitiously told by William Shakespeare in his play Macbeth. In fact, Macbeth came to power after killing his cousin, Duncan I, in battle near Elgin on August the 14th 1040. He was killed in a battle against Malcolm, the eldest son of Duncan I, who was assisted by the English. Research Macbeth