Assertion: dynasty's authority | /r/MadeOf | mongol
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text: During the military rule, Goryeo resisted invasions by the Mongol Empire for almost 30 years, until the ruling head of the Choe family was assassinated in 1258 by opponents in the court, after which authority was restored to the monarchy and peace was made with the Mongols; however, power struggles continued in the court and military rule did not end until 1270.