《新唐书·本纪·卷一·高祖》
十六日，秦王李世民任西讨元帅，讨伐薛仁杲。
己丑，秦王世民为西讨元帅，以讨薛仁杲。
On the 16th, Prince Qin Li Shimin was appointed as the Marshal of the Western Punitive Expedition to quell Xue Rengui.
<s>[INST] Render the following Classical Chinese text into fluent English: 己丑，秦王世民为西讨元帅，以讨薛仁杲。 [/INST] On the 16th, Prince Qin Li Shimin was appointed as the Marshal of the Western Punitive Expedition to quell Xue Rengui.</s>
Render the following Classical Chinese text into fluent English: 己丑，秦王世民为西讨元帅，以讨薛仁杲。
user
On the 16th, Prince Qin Li Shimin was appointed as the Marshal of the Western Punitive Expedition to quell Xue Rengui.
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