Rocket Engine Advancement
North Korean dictator Kim Jong Un oversaw a test of a new high-thrust solid-fuel rocket engine, according to state media. The test involved an engine made with carbon-fiber materials. The engine reportedly produced 2,500 kilonewtons of thrust.
The test is part of a new five-year defense plan to upgrade the country's "strategic strike" capabilities. Kim Jong Un said the test had "great significance in putting the country's strategic military muscle on the highest level," according to KCNA. This marks the first confirmed high-thrust solid-fuel engine test since September, when Pyongyang reported a lower-thrust engine.
Military Capabilities
Analysts say such engines could support more mobile or compact long-range missiles, making them harder to detect. Solid-fuel systems are significant because they can be launched more quickly and with less warning than older liquid-fuel missiles. Hong Min, an analyst at the Korea Institute for National Unification, told the AFP news agency the development demonstrates North Korea's "resolve to acquire missiles capable of hitting targets around the globe."
North Korea's report on the latest test could be "bluffing" as it did not disclose some key information like the engine's total combustion time, according to Lee Choon Geun, an honorary research fellow at South Korea's Science and Technology Policy Institute. Pyongyang still faces major technical barriers before fielding a fully reliable intercontinental ballistic missile, especially ensuring a warhead can survive atmospheric reentry.
Broader Military Modernization
Kim's latest military activities included inspections of special operations training and tests of a new main battle tank, according to KCNA. Kim claimed the tank's protection system could defeat nearly all existing anti-tank weapons, though such assertions could not be independently verified. At a rare ruling party congress held in February, Kim unveiled a new five-year plan that reaffirmed continued development of nuclear weapons, while calling for a broad upgrade of the country's military capabilities.
Analysts and regional governments also pointed to new tank and combined-arms drills as part of Pyongyang's effort to adapt its military doctrine to modern warfare, drawing lessons from recent conflicts and emphasizing integration across ground and missile forces.
Rising Tensions
Just days earlier, Kim accused the US of global "state terrorism and aggression," in an apparent reference to the Iran war and pledged to cement North Korea's nuclear status. Since the collapse of Kim's diplomacy with President Donald Trump in 2019, North Korea has accelerated work on nuclear and missile systems despite sanctions. Kim signaled openness to renewed talks in February if Washington drops its demands for denuclearization.
South Korea and the United States say they are closely monitoring North Korea's weapons developments.
