《新唐书·列传·卷一百四十一》
其时，天子已发幽州兵来讨伐，吐蕃大败。
时天子已发幽州兵驰拒，虏大奔破。
At that time, the emperor had already sent soldiers from Youzhou to attack, and Tubo was badly defeated.
<s>[INST] Rewrite the following English passage in the style of Classical Chinese: At that time, the emperor had already sent soldiers from Youzhou to attack, and Tubo was badly defeated. [/INST] 时天子已发幽州兵驰拒，虏大奔破。</s>
Rewrite the following English passage in the style of Classical Chinese: At that time, the emperor had already sent soldiers from Youzhou to attack, and Tubo was badly defeated.
user
时天子已发幽州兵驰拒，虏大奔破。
assistant