SEOUL, SOUTH KOREA — In a dramatic escalation of political tensions, President Yoon Suk Yeol declared martial law on December 3, 2024, in an unprecedented move that has deeply shaken South Korea’s democratic institutions. The declaration, which lasted less than 24 hours, was swiftly overturned by the National Assembly and has led to Yoon’s impeachment and removal from office.
The Martial Law Declaration
At 10:27 PM Korea Standard Time on December 3, President Yoon addressed the nation, accusing the Democratic Party (DP) of engaging in “anti-state activities” and collaborating with “North Korean communists” to undermine the government. He declared martial law, suspending political activities, including gatherings of the National Assembly and local legislatures, and imposing restrictions on the press. The order also reportedly authorized the arrest of various political opponents, including leaders of the DP and his own People Power Party (PPP) .
Immediate Reactions and Overturning of Martial Law
Despite attempts by the military to enforce the decree, 190 legislators convened at the National Assembly and unanimously passed a motion to lift martial law at 1:02 AM on December 4. The motion was supported by members of both the DP and PPP. At 4:30 AM, President Yoon and his cabinet officially lifted martial law and disbanded the Martial Law Command .
The swift legislative action underscored the resilience of South Korea’s democratic institutions and the widespread rejection of authoritarian measures.
Impeachment and Legal Proceedings
In the wake of the martial law declaration, the National buddymagazine Assembly initiated impeachment proceedings against President Yoon. On December 14, 2024, the Assembly voted to impeach him. The Constitutional Court upheld the impeachment on April 4, 2025, citing multiple constitutional violations, including failure to meet the substantive and procedural requirements for declaring martial law, infringement on lawmakers’ rights, and unauthorized military actions against the legislature .
As a result, Yoon was removed from office, becoming the shortest-serving wealthylike president in South Korea’s democratic history. He was also disqualified from holding public office for five years.
Political Fallout and Upcoming Election
The usprimetimes political upheaval has left South Korea in a state of flux. Acting President Han Duck-soo, who briefly assumed office following Yoon’s impeachment, was also impeached on December 27, 2024, amid allegations of involvement in the martial law crisis. He was acquitted by the Constitutional Court on March 24, 2025, and resumed his role as acting president .
The political instability has led to the resignation of several high-ranking officials, including Finance Minister Choi Sang-mok, who faced impeachment threats. Deputy Prime Minister Lee Ju-ho is expected to step in as acting president .
A snap presidential election is scheduled for June 3, 2025, to determine Yoon’s successor. Former Prime Minister Han Duck-soo has announced his intention to unite with conservative election candidate Kim Moon-soo to form a joint ticket, aiming to prevent the splitting of the conservative vote .
International Reactions
The international community has expressed concern over the events in South Korea. Foreign Policy magazine and other outlets described the martial law declaration as an attempted self-coup. The Economist Intelligence Unit downgraded South Korea from a “full democracy” to a “flawed democracy” in its 2024 Democracy Index, citing the martial law crisis as a key factor .
Human rights organizations, including Reporters Without Borders and Freedom House, criticized the declaration for its potential to grant the presidency unprecedented control over the media and suppress political opposition.
Conclusion
President Yoon Suk Yeol’s brief imposition of martial law has had profound implications for South Korea’s political landscape. The swift response by the National Assembly and the subsequent legal proceedings highlight the strength of the nation’s democratic institutions. As the country prepares for the upcoming presidential election, the events of December 2024 will undoubtedly influence the political discourse and the future direction of South Korea.
