《旧五代史·后唐·庄宗纪二》
王向周德威告急，周德威分兵赴援，杨师厚调转军队侵犯沧州，张万进害怕，就向梁朝投降。
王熔告急于周德威，德威分兵赴援，师厚移军寇沧州，张万进惧，遂降于梁。
Wang sent an urgent message to Zhou Dewei, and Zhou Dewei sent troops to help. Yang Shihou turned his army to attack Cangzhou, and Zhang Wanjin was afraid and surrendered to Liang.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 王熔告急于周德威，德威分兵赴援，师厚移军寇沧州，张万进惧，遂降于梁。 [/INST] Wang sent an urgent message to Zhou Dewei, and Zhou Dewei sent troops to help. Yang Shihou turned his army to attack Cangzhou, and Zhang Wanjin was afraid and surrendered to Liang.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 王熔告急于周德威，德威分兵赴援，师厚移军寇沧州，张万进惧，遂降于梁。
user
Wang sent an urgent message to Zhou Dewei, and Zhou Dewei sent troops to help. Yang Shihou turned his army to attack Cangzhou, and Zhang Wanjin was afraid and surrendered to Liang.
assistant