Drone operation over North Korea: Ex-South Korean president Yoon Suk Yeol jailed 30 years

Former South Korean president Yoon Suk Yeol has been sentenced to 30 years in prison for orchestrating a covert military drone operation over North Korea, in a landmark ruling that has few parallels in the country's democratic history.

The Seoul Central District Court found that Yoon deliberately authorised drone incursions into North Korean airspace in late 2024, not for national security purposes but to manufacture a security crisis that could justify martial law at home. The court concluded that the operation was intended to goad Pyongyang into a reaction and manufacture conditions that would give Yoon cover to expand his powers and move against political opponents.

It is the first time a former South Korean president has been convicted of the charge of undermining the country's military interests by providing a strategic advantage to an enemy state. The verdict marks another dramatic chapter in the downfall of the 65-year-old conservative leader, who is already facing multiple criminal cases stemming from one of the most turbulent periods in modern South Korean politics.

The case centres on a series of drone flights conducted in October and November 2024. During that period, South Korean military drones crossed the heavily fortified border and flew over the North Korean capital, Pyongyang. North Korean authorities accused Seoul of using drones to scatter propaganda leaflets attacking leader Kim Jong-un and the North Korean regime.

Propaganda campaigns have long been part of the bitter rivalry between the two Koreas. Both sides have used balloons and leaflets to send political messages across the border since the Korean War. However, North Korea viewed the drone flights over its capital as a far more serious provocation, warning that such actions risked triggering military conflict. At the time, South Korea's defence ministry declined to confirm or deny the allegations.

After months of investigation, prosecutors concluded that the drone operations were never intended as a legitimate security measure. Instead, they argued that Yoon and his associates planned the missions as part of a broader effort to create what they described as "fabricated wartime conditions". The judge agreed that Yoon and his co-conspirators used a military operation as cover to deliberately provoke North Korea. Their ultimate objective, the court found, was to create a sense of national emergency that could be exploited for domestic political gain.

Several military officers acknowledged that they had carried out orders to conduct the drone flights. However, investigators found that many of them were unaware of the broader political objectives behind the operation. Three other senior officials were also convicted. Former defence minister Kim Yong-hyun received a 30-year prison sentence. Former counterintelligence commander Lieutenant General Yeo In-hyong was sentenced to 15 years, while former drone operations commander Kim Yong-dae received a three-year sentence suspended for five years.

According to prosecutors, the manufactured security crisis was intended to provide justification for a martial law declaration that would allow Yoon to neutralise his political opponents.

Although North Korea did not respond militarily to the drone flights, Yoon proceeded with the plan. On December 3, 2024, he declared martial law, claiming the country faced a threat from "anti-state" forces sympathetic to North Korea. He specifically targeted the opposition-controlled National Assembly, describing it as "a den of criminals".

The declaration plunged South Korea into its most serious political crisis in decades. Armed troops entered the National Assembly building, while thousands of citizens gathered outside in protest. In scenes that shocked the country, demonstrators physically blocked soldiers and helped prevent the arrest of opposition leader Lee Jae-myung. Their actions bought lawmakers enough time to enter the chamber and vote down the martial law decree.

The resistance proved too great, and Yoon was forced to withdraw the order after just six hours. Throughout the legal proceedings, Yoon maintained his innocence. His lawyers contended that he had neither ordered nor formally approved the drone flights, and argued the operations had no bearing on the martial law declaration that followed. They held that the flights were a legitimate response to North Korea's practice of sending balloons carrying rubbish and waste materials into South Korean territory. After the verdict, Yoon's legal team said it would appeal, warning the ruling posed a threat to South Korea's national security interests. The court rejected that case, finding the operation had been mounted for personal political reasons rather than the defence of the country. The consequences of Yoon's actions have fundamentally altered the shape of South Korean politics. He was impeached and removed from office after the martial law attempt collapsed. In separate proceedings, he was sentenced to life imprisonment for leading an insurrection and received an additional five-year sentence for abuse of power and obstructing efforts to arrest him.

The snap presidential election that followed was won by liberal opposition leader Lee Jae-myung. Since coming to power, Lee has had to navigate the fallout from the crisis. He has expressed regret over the drone operations and indicated that South Korea ought to apologise to North Korea, but relations between the two sides remain deeply strained.

The Korean Peninsula technically remains at war, and drone incidents are still seen as potential flashpoints. After the controversy, Pyongyang returned to describing South Korea as its "most hostile" enemy, underlining how heavily Yoon's actions continue to weigh on inter-Korean relations.