What did Genghis khan do to expand the mongol empire

He came to power by uniting many of the nomadic tribes of Northeast Asia. After founding the Empire and being proclaimed Genghis Khan, he launched the Mongol invasions that conquered most of Eurasia. ... Later his grandsons split his empire into khanates. Genghis Khan died in 1227 after defeating the Western Xia.

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After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China. His descendants expanded the empire even further, advancing to such far-off places as Poland, Vietnam, Syria and Korea. The empire unified the nomadic Mongol and Turkic tribes of historical Mongolia under the leadership of Genghis Khan, who was proclaimed ruler of all Mongols in 1206. The empire grew rapidly under his rule and then under his descendants, who sent invasions in every direction.

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c-three

explanation:

legislative, executive and judicial