Is king duncan shrewed military leader?

Yes, King Duncan is shown to be a shrewd military leader in the play "Macbeth." He is described as a "noble" and "brave" warrior who has successfully defended his kingdom against its enemies. He is also a wise and just ruler who is loved by his people. However, his trust in Macbeth ultimately proves to be his downfall, as Macbeth's ambition and desire for power lead him to betray and murder Duncan.