North Korean leader Kim Jong Un oversaw a live-fire test of 600mm-caliber multiple rocket launchers on Saturday, accompanied by his teenage daughter Kim Ju Ae, according to the Korean Central News Agency.

The drill involved 12 ultra-precision launchers operated by two artillery companies from the Korean People's Army's western front. The rockets struck an island target in the East Sea, approximately 364.4 kilometers away, with 100 percent accuracy.

Kim described the system as capable of a 420-kilometer strike range, stating it would expose enemies to 'uneasiness' and provide 'a deep understanding of the destructive power of tactical nuclear weapons.' He added that if used, 'the opponent's military infrastructure within its striking range can never survive,' and the weapons would serve as a 'means of massive, destructive strike' if deterrence failed.

The launchers, newly delivered ahead of the Ninth Workers' Party Congress and showcased in February, can carry the Hwasan-31 tactical nuclear warhead. Their design allows strikes on major U.S. air bases in South Korea, such as those in Pyeongtaek, Osan, and Gunsan. The wheeled platforms reduce vibration and enable rapid firing and repositioning in under a minute.

South Korea's military detected about 10 ballistic missiles launched from near Pyongyang toward eastern waters, traveling roughly 350 kilometers. Seoul's national security council condemned the action as a provocation violating U.N. Security Council resolutions on ballistic activities.

The test occurred during the U.S.-South Korea Freedom Shield exercises, a computer-simulated command post drill running through March 19. Pyongyang views these annual trainings as 'provocative war rehearsals,' while Washington and Seoul describe them as defensive. Kim's sister, Kim Yo Jong, echoed this criticism, calling the drills harmful to regional stability.

Experts note that North Korea's large rocket launchers blur lines between artillery and missiles, featuring thrust and guidance for nuclear delivery. The country has conducted frequent weapons tests amid international sanctions since 2006, often timing them with joint drills by Seoul and Washington.

This demonstration follows recent North Korean activities, including missile tests from destroyers and handgun trials at munitions factories. Despite U.S. President Donald Trump's expressed interest in dialogue, Pyongyang maintains relations with the South as between 'two hostile states.'