In Scene 2: what three men are leading troops into battle against Duncan? whats the answer

In this scene, Duncan's forces have been attacked by a number of different forces.  The forces that are attacking Duncan's are led by the following three men:

• McDonald (or MacDonwald), who was leading Irish troops


• The Thane of Cawdor, who was rising up against his own king


• Sweno, the King of Norway.

We find this out because the Thane of Ross has come to tell Duncan about how the battle has turned out.  He tells the king that his forces were in danger for a while but that Macbeth was the one who saved the day.