《明史·列传·卷四十三》
回师时他殿后，就在军中进升为左都督，遣去镇守孙东。
师还为殿，即军中进左都督，遣镇辽东。
On the way back, he stood firm at the rear, so in the army he was promoted to left director and sent to garrison Sundong.
<s>[INST] Convert the following English text into Classical Chinese: On the way back, he stood firm at the rear, so in the army he was promoted to left director and sent to garrison Sundong. [/INST] 师还为殿，即军中进左都督，遣镇辽东。</s>
Convert the following English text into Classical Chinese: On the way back, he stood firm at the rear, so in the army he was promoted to left director and sent to garrison Sundong.
user
师还为殿，即军中进左都督，遣镇辽东。
assistant