South Korea witnessed a dramatic turn of events late Tuesday night as President Yoon Suk Yeol declared martial law for the first time in nearly five decades, citing threats from “anti-state forces” and North Korea.
The unexpected announcement, delivered during a late-night televised address, temporarily invoked emergency measures restricting political activity, brought media under state control, and ordered striking workers back to their jobs.
The move sparked immediate backlash, including dissent within Yoon’s People’s Power Party. Lawmakers defied military presence to vote overwhelmingly against the martial law decree, repealing it within six hours. The unprecedented events have now led to the opposition filing an impeachment motion, accusing Yoon of violating the constitution and attempting to obstruct investigations into alleged illegal activities involving him and his family.
Opposition lawmakers and citizens denounced the move as unconstitutional and an affront to the country’s democratic principles. Within hours, thousands of protesters gathered outside the National Assembly, chanting slogans against dictatorship, while lawmakers from the Democratic Party led efforts to overturn the measure. The declaration, which briefly put the military in control, was nullified by a parliamentary vote in the early hours of Wednesday.
Critics described the martial law decree, which suspended the activities of political parties and the media, as an act of desperation by a president under mounting political pressure. Yoon had framed the decision as a response to “anti-state forces” and an urgent measure to restore order. However, opposition parties accused him of using it as a shield against investigations into alleged misconduct involving himself and his family. The swift parliamentary rejection of the order has now escalated calls for Yoon’s impeachment.
The opposition-controlled National Assembly has formally submitted a motion to impeach Yoon, accusing him of grave constitutional violations and labeling his actions as “insurrectionary behavior.”
A vote on the motion is expected soon. The Democratic Party requires support from at least eight ruling party lawmakers to secure the two-thirds majority needed for impeachment. The case would proceed to the Constitutional Court for final adjudication if passed.
The political fallout has not been limited to Yoon alone. Defense Minister Kim Yong-hyun, who played a key role in enforcing the martial law order, has offered his resignation. The Democratic Party had also filed a motion to impeach Kim, but if Yoon accepts his resignation before a parliamentary vote, the impeachment process for the minister will become moot. The situation has plunged the government into its deepest crisis since Yoon’s election.
Internationally, the martial law declaration has raised alarm among South Korea’s allies. The United States, which maintains a military presence of nearly 30,000 troops in the country, expressed concern over the developments. The crisis has led to the postponement of key meetings of the Nuclear Consultative Group and cast uncertainty over an anticipated visit by U.S. Defense Secretary Lloyd Austin. The rapid reversal of martial law brought relief but left questions about South Korea’s political stability.
Yoon’s presidency, already weakened by low approval ratings and allegations of corruption, now faces an uncertain future. Comparisons have been drawn to the impeachment of former President Park Geun-hye, who was removed from office in 2017—a process that Yoon himself had overseen as a prosecutor.
Candlelight vigils reminiscent of the protests during Park’s impeachment have begun in major cities, signaling growing public discontent. The president’s gambit to impose martial law, intended to assert control, has instead backfired, leaving his political career hanging by a thread.
The opposition Democratic Party has filed a motion to impeach President Yoon, forcing the National Assembly to vote by Saturday. To succeed, the motion needs support from at least two-thirds of the 300-member Assembly, which means securing 200 votes. If the impeachment is approved, a trial will be held before the Constitutional Court.
A majority of six out of the nine court members would need to uphold the decision to remove Yoon from office. This is not the first time a South Korean president has faced impeachment—Park Geun-hye was removed in 2016, while Roh Moo-hyun’s 2004 impeachment was later overturned.
Yoon’s sudden decision to declare martial law has sparked widespread shock and criticism, with many viewing it as an overreach that risks the nation’s democracy and stability.
Experts, such as Leif-Eric Easley from Ewha University, argue that the move was a political misstep, exacerbating scandals and intensifying calls for impeachment. Public reaction has been swift, with strikes in Seoul and resignation offers from senior government officials.
Meanwhile, international powers, including the United States, China, and Japan, have expressed concern over the situation, with Japan even canceling an official visit to South Korea.
