《明史·列传·卷一百六十七》
双方隔江相持了一个月，官兵粮食用完了，一蘅只好退驻古蔺州，杨展退驻江津。
隔江持一月，粮尽，一蘅退屯古蔺州，展退屯江津。
The two sides held each other in check across the river for a month, and when the government troops ran out of food, Yi Heng had no choice but to retreat to Guilin Prefecture, and Yang Zhan retreated to Jiangjin.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 隔江持一月，粮尽，一蘅退屯古蔺州，展退屯江津。 [/INST] The two sides held each other in check across the river for a month, and when the government troops ran out of food, Yi Heng had no choice but to retreat to Guilin Prefecture, and Yang Zhan retreated to Jiangjin.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 隔江持一月，粮尽，一蘅退屯古蔺州，展退屯江津。
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The two sides held each other in check across the river for a month, and when the government troops ran out of food, Yi Heng had no choice but to retreat to Guilin Prefecture, and Yang Zhan retreated to Jiangjin.
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