《北史·本记·卷十二》
九月十五日，突厥解围而去。
九月甲辰，突厥解围而去。
On September 15, the Turks lifted the siege and left.
<s>[INST] Render the following Classical Chinese text into fluent English: 九月甲辰，突厥解围而去。 [/INST] On September 15, the Turks lifted the siege and left.</s>
Render the following Classical Chinese text into fluent English: 九月甲辰，突厥解围而去。
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On September 15, the Turks lifted the siege and left.
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