South Korean President Yoon Suk Yeol is facing impeachment by parliament after he declared martial law only to revoke it 6 hours later amid immense backlash.

South Korea’s president has accepted the resignation offer by his defense minister, as opposition parties moved to impeach both men over the stunning yet short-lived imposition of martial law that brought armed troops into Seoul streets.

SEOUL—A day after declaring martial law, South Korea’s president is now facing the prospect of impeachment, creating more political instability for a close U.S. ally and prompting the resignation of the country’s defense minister.