King Hyojong (3 July 1619 – 23 June 1659) was the seventeenth king of the
Joseon Dynasty of
Korea from 1649 to 1659. He is best known for his plan for expedition to
Manchu Qing dynasty and his campaigns against the
Russian Empire by the request of
Qing dynasty. His plan for the northern expedition was never put into action since he died before the campaign started.