《资治通鉴·唐纪·唐纪二》
窦建德攻克冀州后，声威更加壮大，又率十万人侵犯幽州。
窦建德既克冀州，兵威益盛，帅众十万寇幽州。
After Dou Jiande conquered Jizhou, his reputation became even greater, and he led 100,000 people to invade Youzhou.
<s>[INST] Kindly elucidate the central themes in this passage in English: 窦建德既克冀州，兵威益盛，帅众十万寇幽州。 [/INST] After Dou Jiande conquered Jizhou, his reputation became even greater, and he led 100,000 people to invade Youzhou.</s>
Kindly elucidate the central themes in this passage in English: 窦建德既克冀州，兵威益盛，帅众十万寇幽州。
user
After Dou Jiande conquered Jizhou, his reputation became even greater, and he led 100,000 people to invade Youzhou.
assistant