《旧唐书·本纪·卷十七》
十三日，诏： 元和、长庆年代期间，总是通过战争，才能暂时维持局面，而朝廷所下的命令，很难贯彻执行。
癸卯，诏： 元和、长庆中，皆因用兵，权以济事，所下制敕，难以通行。
On the thirteenth day, an edict was issued: between the Yuanhe and Changqing years, peace and order were only maintained temporarily because of wars, and it was difficult for the government to execute its decrees.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 十三日，诏： 元和、长庆年代期间，总是通过战争，才能暂时维持局面，而朝廷所下的命令，很难贯彻执行。 [/INST] 癸卯，诏： 元和、长庆中，皆因用兵，权以济事，所下制敕，难以通行。</s>
Convert the following modern Chinese text into Classical Chinese: 十三日，诏： 元和、长庆年代期间，总是通过战争，才能暂时维持局面，而朝廷所下的命令，很难贯彻执行。
user
癸卯，诏： 元和、长庆中，皆因用兵，权以济事，所下制敕，难以通行。
assistant