Given the task definition and input, reply with output. In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: The Xia (13621371), officially the Great Xia and known as Ming Xia today, was a short-lived Chinese dynasty in modern Sichuan and Chongqing during the chaotic late Yuan dynasty. It was founded by the Red Turban rebel general Ming Yuzhen whose army expelled Yuan loyalists from the region in the late 1350s. He refused to recognize Chen Youliang, who killed the Red Turban leader Xu Shouhui to found his Chen Han empire, so in 1362 Ming declared himself emperor of Xia, with the capital in Chongqing. He defended his empire from Chen Han, and tried, unsuccessfully, to conquer Yunnan from the warlord Basalawarmi. After his death in 1366, his teenaged son Ming Sheng succeeded him, but the empire began to disintegrate into regional military commands. In 1371, the Ming dynasty under emperor Zhu Yuanzhang made a two-pronged attack and conquered Xia relatively easily. Ming Sheng who surrendered was exiled to Goryeo, and became the progenitor of the Korean Namwon Seung clan, Yeonan Myeong clan and Seochok Myeong clan.
Link Information: Although the Mongols had ruled territories including modern-day North China for decades, it was not until 1271 Answer: 1271
Why was the Yuan dynasty considered chaotic?