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 Koreans will head to the polls on Tuesday in a snap presidential election following the removal from office of previous leader Yoon Suk-yeol, who was ousted over his brief but disastrous declaration of martial law in December.

Mr. Lee cruised to victory on Tuesday after his predecessor pitched the country into chaos with a brief declaration of martial law.