Martial Law and Mayhem

The arrest of South Korea’s President Yoon Suk Yeol on charges of insurrection marks a dramatic chapter in the country’s turbulent political history. Yoon, detained at the Seoul Detention Centre, stands accused of attempting to impose martial law in early December, a move swiftly rejected by the National Assembly. The Corruption Investigation Office for High-ranking Officials (CIO), spearheading the inquiry, is pressing to extend his detention while his impeachment trial unfolds. As South Koreans grapple with the spectacle of their second conservative president facing impeachment in less than a decade, the arrest lays bare the frailty of the nation’s political institutions and its deeply polarised society.

Yoon’s predicament is extraordinary, even by the standards of South Korea’s volatile politics. The country’s modern history is littered with leaders who have faced legal or political reckoning after leaving office. The list includes Park Geun-hye, Yoon’s predecessor from the conservative People Power Party (PPP), who was impeached and imprisoned in 2017 over a corruption scandal. Yet Yoon’s case is unique for involving the arrest of a sitting president—a first in South Korean history—and for the gravity of the allegations. Insurrection carries a maximum sentence of life imprisonment or, in theory, the death penalty.

South Korea is no stranger to political tumult. Its transition from military dictatorship to democracy in the late 20th century was hard-won, and the scars of authoritarianism remain. Yoon’s declaration of martial law—brief but alarming—evoked memories of the country’s oppressive past under generals such as Park Chung-hee and Chun Doo-hwan. The move came amid widespread protests against Yoon’s administration, with critics accusing him of undermining democratic norms. His impeachment on December 14 by a parliamentary majority reflected a rare moment of unity in a fractious legislature, as both ruling and opposition lawmakers acted decisively against what they viewed as an unacceptable overreach of executive power.

Polls suggest that while a majority of South Koreans support his impeachment, the arrest has galvanised his base. The PPP’s approval ratings have climbed in the wake of Yoon’s detention, overtaking those of the main opposition Democratic Party (DP) for the first time since August. The party’s hardline messaging, painting Yoon as a victim of political persecution, has resonated with conservative voters, further deepening the nation’s political divides.

The turmoil has economic repercussions too. Consumer sentiment has plunged to levels last seen during the Covid-19 pandemic, while the South Korean won has weakened against the dollar. Unemployment has risen to its highest since 2021, underscoring the fragility of Asia’s fourth-largest economy.

Yoon’s defiance in the face of legal scrutiny compounds the crisis. His refusal to cooperate with investigators, citing a lack of necessity for further questioning, has frustrated efforts by the CIO to build their case. Adding to the drama, Kim Sung-hoon, the acting chief of the Presidential Security Service, was arrested last week for obstructing investigators during an earlier attempt to detain Yoon. Such developments highlight the extraordinary lengths to which Yoon and his allies have gone to resist accountability.

Beyond South Korea’s borders, the crisis has geopolitical ramifications. Washington has expressed concern over Yoon’s declaration of martial law, warning that it undermines the country’s democratic credentials. National Security Adviser Jake Sullivan has cautioned that the unrest could embolden North Korea, which has thus far refrained from public commentary on Yoon’s arrest. Pyongyang’s silence may reflect a calculated effort to exploit the situation to its advantage, as South Korea’s internal divisions weaken its posture against its nuclear-armed neighbour.

As Yoon’s impeachment trial proceeds, the question of what comes next looms large. If the Constitutional Court upholds the impeachment, South Korea will head to fresh elections within 60 days. Political analysts, however, warn that a new election is unlikely to heal the nation’s divisions. South Korea’s leaders must tread carefully if they are to steer the nation through these perilous times and restore faith in its democratic institutions.