South Korea’s Constitutional Court has unanimously removed Yoon Suk Yeol as president after he threw the nation into turmoil by declaring martial law and sending troops to parliament in an ill-fated effort to break through legislative gridlock.

The nation’s top court unanimously upheld the impeachment of Yoon Suk Yeol, clearing the way for the election of a new president.

Yoon Suk Yeol’s ouster over his martial-law decree triggers a snap vote to elect a leader who will face challenges on trade, U.S. relations and North Korea.