In a landmark ruling that caps months of political upheaval in South Korea, the Seoul District Court has handed down a 30-year prison sentence to former President Yoon Suk Yeol for orchestrating a covert drone operation into North Korea, a plot prosecutors say was designed to stoke cross-border tensions and justify his ultimately failed bid to declare martial law in late 2024.
The verdict, delivered Friday, also convicted three other senior former national security officials alongside Yoon: ex-Defense Minister Kim Yong-hyun, who received an identical 30-year sentence, former Defense Counterintelligence Command head Yeo In-hyung, who was sentenced to 15 years behind bars, and former Drone Operations Command chief Kim Yong-dae, who got three years in prison with a five-year suspended sentence. All four defendants were found guilty on charges of treason and abuse of power.
Prosecutors laid out that Yoon ordered the cross-border drone mission in October 2024, with the explicit goal of provoking a response from Pyongyang. This manufactured crisis, they argued, would create a pretext for Yoon to crack down on domestic political opponents ahead of his martial law declaration one month later. When Yoon officially imposed martial law on December 3 that year, he publicly framed the move as a necessary step to protect South Korea from so-called “anti-state” forces aligned with North Korea. But the power grab quickly collapsed: mass public protests erupted across the country, and Yoon was forced to reverse the order within hours, exposing his move as a response to mounting domestic political pressure rather than a genuine national security threat.
The court’s ruling echoed prosecutors’ core account of the plot. “The defendants used the guise of a military operation to induce provocations from North Korea with the aim of creating a state of emergency,” the court said in its written judgment. Officials noted that the reckless drone mission directly raised the risk of full-scale military conflict on the Korean Peninsula, and emphasized that Yoon bore the “greatest responsibility” for the scheme.
Yoon’s defense team attempted to justify the drone operation as a legitimate reciprocal response to cross-border provocations from Pyongyang, pointing to a series of trash balloons launched from North Korea into South Korean territory throughout 2024. Cross-border balloon campaigns have been a staple of low-level tensions between the two Koreas since the Korean War, historically used to distribute propaganda leaflets. In 2024, however, tensions spiked dramatically after North Korea accused South Korea of flying drones into Pyongyang that scattered anti-North Korean propaganda across the capital – a move Pyongyang warned could push the peninsula to the brink of war. Friday’s ruling confirmed that those drones were in fact sent by Yoon’s order, designed to elicit a harsh North Korean response.
This latest conviction adds to a growing stack of severe sentences for the former president. Yoon was already impeached following the failed martial law attempt, and has previously been sentenced to life in prison for insurrection connected to the power grab. An additional five-year sentence was also added Friday for abuse of power and obstructing the execution of an arrest warrant for Yoon.
Yoon’s botched martial law attempt and the months of political chaos that followed upended South Korea’s political landscape, culminating in a snap presidential election that delivered a decisive victory to opposition Democratic Party candidate Lee Jae-myung, cementing a major shift in the country’s leadership.