《新唐书·列传·卷一百四十九》
天平军听说发生变故，其校将张桀带五百兵士迎战，不胜。
天平军闻变，其校张桀以士五百格战，不胜。
The Tianping army heard about the incident, and its school captain Zhang Jie led 500 soldiers to fight, but they were defeated.
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 天平军闻变，其校张桀以士五百格战，不胜。 [/INST] 天平军听说发生变故，其校将张桀带五百兵士迎战，不胜。</s>
Translate the following Classical Chinese text into modern Chinese: 天平军闻变，其校张桀以士五百格战，不胜。
user
天平军听说发生变故，其校将张桀带五百兵士迎战，不胜。
assistant