《元史·本纪·卷十》
十四日，把朵哥麻思地方的算木多城改为镇西府。
己未，以朵哥麻思地之算木多城为镇西府。
On the fourteenth, the city of Suanduo, in the Daduoma Division, was renamed Zhenxifu.
<s>[INST] Kindly elucidate the central themes in this passage in English: 己未，以朵哥麻思地之算木多城为镇西府。 [/INST] On the fourteenth, the city of Suanduo, in the Daduoma Division, was renamed Zhenxifu.</s>
Kindly elucidate the central themes in this passage in English: 己未，以朵哥麻思地之算木多城为镇西府。
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On the fourteenth, the city of Suanduo, in the Daduoma Division, was renamed Zhenxifu.
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