《后汉书·列传·王刘张李彭卢列传》
后来匈奴衰弱了，呼韩邪单于归顺于汉，汉为其发兵加以保护，单于世世称臣。
后匈奴中衰，呼韩邪单于归汉，汉为发兵拥护，世世称臣。
Later, Xiongnu grew weak. Chanyu Huhanye surrendered to Han, and Han sent out troops to protect him, hence, Chanyu serve as ministers from generation to generation.
<s>[INST] Translate the following Classical Chinese text into English: 后匈奴中衰，呼韩邪单于归汉，汉为发兵拥护，世世称臣。 [/INST] Later, Xiongnu grew weak. Chanyu Huhanye surrendered to Han, and Han sent out troops to protect him, hence, Chanyu serve as ministers from generation to generation.</s>
Translate the following Classical Chinese text into English: 后匈奴中衰，呼韩邪单于归汉，汉为发兵拥护，世世称臣。
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Later, Xiongnu grew weak. Chanyu Huhanye surrendered to Han, and Han sent out troops to protect him, hence, Chanyu serve as ministers from generation to generation.
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