Final answer:
Macbeth and Banquo won the first battle against the rebels, and Macbeth was rewarded with the title of Thane of Cawdor for his valor.
Step-by-step explanation:
After Macbeth and Banquo defeat the first round of rebels, they were victorious in the battle. The king, upon hearing of their success, is very pleased with Macbeth's brave efforts and military prowess. In acknowledgment of his valor and substantial contribution to quashing the insurrection, Macbeth is granted the title of Thane of Cawdor as a reward, a title that was previously held by a traitor.