《资治通鉴·晋纪·晋纪三十九》
我姚成都准备纠集义兵，前往黄河之上与您相见。 
成都将纠合义兵，往见明公于河上耳。 
He then sent out an edict to the various cities, making it clear what was in line with the will of heaven and what was rebellion, and collected troops and mobilized military supplies to use to attack Yao Yi.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 成都将纠合义兵，往见明公于河上耳。  [/INST] He then sent out an edict to the various cities, making it clear what was in line with the will of heaven and what was rebellion, and collected troops and mobilized military supplies to use to attack Yao Yi.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 成都将纠合义兵，往见明公于河上耳。
user
He then sent out an edict to the various cities, making it clear what was in line with the will of heaven and what was rebellion, and collected troops and mobilized military supplies to use to attack Yao Yi.
assistant