Yoon Suk Yeol rose from a high-profile career as a public prosecutor to become the President of South Korea in 2022, only to experience one of the most turbulent and short-lived administrations in modern democratic history. His tenure ended abruptly following a brief, failed declaration of martial law that led to his impeachment, removal from office, and subsequent life sentence for insurrection. Understanding his trajectory requires examining how an uncompromising prosecutorial mindset translated into deep political polarization and structural crises.
From Career Prosecutor to National Figure
Born in Seoul in 1960, Yoon studied law at Seoul National University. After passing the bar exam in 1991 following several attempts, he embarked on a nearly three-decade career as a state prosecutor. He earned a reputation as a tough, uncompromising investigator who resisted political interference. His most famous early career milestone came when he served as a senior investigator under a special counsel team that helped secure the corruption-related conviction and impeachment of former President Park Geun-hye in 2016 and 2017.
Recognizing his anti-corruption stance, liberal President Moon Jae-in appointed Yoon as the chief prosecutor of the Seoul Central District Prosecutors' Office and later as the Prosecutor General. However, relations with the Moon administration deteriorated rapidly when Yoon's office launched high-profile investigations into close allies of President Moon. These clashes transformed Yoon from a state bureaucrat into a conservative political symbol. He resigned from his post in 2021 and joined the conservative People Power Party, leveraging his anti-establishment appeal to enter presidential politics without any prior legislative experience.
The 2022 Election and Political Ascent
Yoon won the March 2022 presidential election by the narrowest margin in South Korean history, defeating liberal candidate Lee Jae-myung by less than one percentage point. His campaign capitalized on public frustration with soaring housing prices, economic inequality, and fatigue with the ruling liberal party's policies. He also drew criticism for running a deeply polarized campaign, which included populist pledges such as abolishing the Ministry of Gender Equality and Family to appeal to young male voters.
Upon taking office in May 2022, Yoon broke with tradition by relocating the presidential office out of the historical Blue House to the Ministry of National Defense building in Yongsan, framing the move as an effort to connect more closely with the public. Yet, his administration struggled immediately with legislative gridlock. Because the opposition Democratic Party maintained a firm majority in the National Assembly, Yoon faced constant hurdles in passing his domestic policy agenda, leading to a protracted political stalemate.
Domestic Challenges and Mounting Crises
Throughout his presidency, Yoon's approval ratings remained low, frequently hovering between twenty and thirty percent. His administration faced several severe internal crises that alienated the public:
- The Seoul Halloween Crowd Crush: In October 2022, a tragic crowd crush in the Itaewon district of Seoul claimed over 150 lives. The government's slow and uncoordinated emergency response triggered widespread public outrage and demands for ministerial accountability.
- The Medical Strike Crisis: In early 2024, Yoon pushed a sweeping plan to drastically increase medical school admissions to address a doctor shortage. The move sparked a prolonged strike by thousands of resident doctors that severely disrupted hospital operations across the country.
- Economic Strains: Persistent inflation, high interest rates, and a stagnant job market eroded middle-class support, while budget cuts to public research and development (R&D) infuriated the scientific community.
- First Lady Scandals: Yoon faced continuous political damage from allegations involving his wife, Kim Keon-hee, who was accused of accepting luxury gifts and engaging in stock manipulation, while the president repeatedly vetoed independent investigations into the matter.
In the April 2024 legislative elections, the opposition parties increased their parliamentary majority, leaving Yoon as a heavily constrained "lame duck" president for the remainder of his term.
Foreign Policy Realignment
While domestic governance proved contentious, Yoon's foreign policy marked a sharp departure from his predecessor's approach. He prioritized a muscular alignment with the United States and sought to mend historical grievances with Japan to build a unified trilateral security framework against North Korean nuclear threats and Chinese regional influence.
His administration actively expanded military drills with Washington, enhanced intelligence-sharing capabilities with Tokyo, and provided humanitarian and financial support to Ukraine. While Western allies welcomed this strategic pivot, critics at home argued that it unnecessarily antagonized Beijing and Moscow—South Korea's major economic partners—without securing meaningful concessions from Pyongyang.
The Martial Law Attempt and Impeachment
The defining crisis of Yoon's presidency occurred late on December 3, 2024, when he made a stunning late-night television broadcast declaring emergency martial law. Citing what he termed "anti-state forces" and communist sympathizers within the political opposition for paralyzing government functions, Yoon deployed troops to the National Assembly.
Lawmakers defied military cordons, scaling fences to enter the chamber, and unanimously passed a resolution demanding the immediate lifting of martial law. Facing total resistance from parliament, the public, and even members of his own political party, Yoon rescinded the order hours later.
The backlash was immediate and absolute. The National Assembly voted to impeach Yoon on December 14, 2024, stripping him of his executive powers while the Constitutional Court weighed his permanent removal. In the months that followed, criminal investigations led to his arrest on charges of insurrection, abuse of power, and obstruction of justice. In early 2026, courts convicted him of leading an insurrection and sentenced him to life imprisonment, concluding a dramatic chapter in modern South Korean history.
Frequently Asked Questions
When was Yoon Suk Yeol elected president?
Yoon was elected in March 2022 and assumed office on May 10, 2022, serving as the 13th President of South Korea until his impeachment.
Why was Yoon Suk Yeol impeached?
The National Assembly impeached Yoon following his sudden, unconstitutional declaration of martial law in December 2024, which lawmakers and the public viewed as an attempt to subvert democratic governance.
What happened to Yoon after his presidency?
Following his removal from office, Yoon faced extensive criminal probes, resulting in a trial where he was convicted of leading an insurrection and sentenced to life imprisonment.
What was Yoon's background before entering politics?
Before entering politics, Yoon spent nearly three decades as a public prosecutor, famously leading investigations that resulted in the convictions of high-profile business leaders and former President Park Geun-hye.
