Twelve dictators and presidents prior to Yoon having been overthrown, investigated for crimes, impeached or threatened with impeachment, imprisoned, assassinated or sentenced to death since 1948.

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.