Candle-lit vigils and rallies were held across South Korea on Wednesday, a nation outraged and frustrated by the president’s surprise declaration of martial law the night before called for his resignation.

South Korean President Yoon Suk Yeol declared martial law and now faces impeachment over the surprising move from opposition lawmakers.

SEOUL, South Korea (AP) — President Yoon Suk Yeol’s stunning martial law declaration lasted just hours, but experts say it raised serious questions about his ability to govern for the remaining 2 1/2 years of his term and whether he will abide by democratic principles.