During the Battle of Buyur Lake, General Lan Yu leads a Ming army forward to crush the Mongol hordes of Tögüs Temür, the Khan of Northern Yuan.

The Battle of Buir Lake was fought between the Ming and Northern Yuan dynasties at the Buir Lake in 1388. The Ming army was led by General Lan Yu, who undertook the military campaign against the Northern Yuan horde led by Tögüs Temür. The Ming army defeated the Northern Yuan horde at the Buir Lake and captured many of their people.

Lan Yu was a Chinese military leader and one of the most influential generals of the Hongwu Emperor, the founder and first emperor of the Ming dynasty. His exceptional military skills and the support of his relative, General Chang Yuchun, earned him a high-ranking position in the Ming army. Throughout the 1380s, he rose to prominence as one of the empire's top military leaders. However, in 1393, he was accused of conspiracy and attempted coup, leading to his downfall and execution. His family and a large number of his relatives and subordinates were also executed, resulting in the deaths of thousands of people during the purge.

The Ming dynasty, officially the Great Ming, was an imperial dynasty of China that ruled from 1368 to 1644, following the collapse of the Mongol-led Yuan dynasty. The Ming was the last imperial dynasty of China ruled by the Han people, the majority ethnic group in China. Although the primary capital of Beijing fell in 1644 to a rebellion led by Li Zicheng, numerous rump regimes ruled by remnants of the Ming imperial family, collectively called the Southern Ming, survived until 1662.

Uskhal Khan, also called the Last Lord of Northern Yuan or by his era name the Tianyuan Emperor, born Tögüs Temür, was an emperor of the Northern Yuan dynasty, reigning from 1378 to 1388. He was the last powerful khagan of the Mongols until Dayan Khan.