What is the political situation in Scotland when Macbeth opens?

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cybil eNotes educator| Certified Educator

A war between the Scottish army and invading Norwegian troops reinforced by some Scottish rebels, led by Macdonwald and the Thane of Cawdor, is taking place. Macbeth and Banquo are the captains leading Duncan's forces. The outcome of the battles will determine Scotland's future. Will it continue to be a sovereign nation with Duncan as king, or will it fall to the invaders?