Opposition leader Lee Jae-myung was sworn in as South Korea’s next president on Wednesday following a dramatic snap election six months after the country’s previous leader declared martial law and plunged the nation into chaos.

South Korea’s liberal-led legislature has voted overwhelmingly to launch special investigations into former President Yoon Suk Yeol’s short-lived imposition of martial law in December and criminal allegations against his wife.

South Koreans headed to the polls in record numbers on Tuesday to vote for a new president exactly six months after a botched martial law decree by impeached President Yoon Suk Yeol unleashed political turmoil and deepened divisions in the country.