King Duncan I is killed by Macbeth

King Duncan I of Scotland is killed in battle against his first cousin Macbeth, who subsequently claims the throne. The violent confrontation takes place near Elgin, Scotland, as Macbeth seeks to usurp his cousin's position. Duncan's death marks a significant transfer of power from the traditional royal lineage to a more militaristic leadership under Macbeth. The battle showcases the tensions and rivalries among the Scottish nobility during this period.