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North Korea Military Capabilities: KN-23 Missiles, the DMZ Buildup and the Russia Link

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WarBrief Live | November 8, 2026 | Country Profile

North Korea’s military is at the centre of two wars at once: its KN-23 ballistic missiles are being fired at Ukraine by Russia, and its border with South Korea is the tensest it has been in years after a landmine blast in the Demilitarised Zone (DMZ) injured three South Korean soldiers.

Key Takeaways

  • About 1.28 million active troops and an estimated 60 assembled nuclear warheads (IISS/SIPRI 2026).
  • The KN-23 missile (range about 690 km) is now a battlefield weapon in Ukraine — preliminary Ukrainian findings link it to the November 7 strike on Kyiv’s power grid.
  • North Korean troops have served in Russia’s Kursk region since October 2024; Russia has received millions of its shells.
  • The DMZ is deteriorating after a September 21 mine blast blamed on Pyongyang and new units moved to “firing positions” in October.

Overview: a nuclear-armed army built for regime survival

North Korea, formally the Democratic People’s Republic of Korea (DPRK), maintains one of the world’s largest standing armies relative to its population, under leader Kim Jong Un. Its doctrine is built around regime survival: a nuclear deterrent, massed artillery ranged on Seoul, special-operations forces, and a growing missile programme. Pyongyang publishes almost no verifiable defence data, so every figure below is an outside estimate.

What are North Korea’s military capabilities?

The Korean People’s Army (KPA) is dominated by its ground force. The International Institute for Strategic Studies (IISS) puts active personnel at about 1.28 million in its Military Balance 2026. Much of the equipment is old: more than 3,500 main battle tanks, more than 8,600 artillery guns and 5,500 multiple rocket launchers (IISS 2024). But age is offset by mass, hardened positions near the border, and artillery ranged on Seoul, a city of about 10 million people.

Illustration of the Korean Demilitarised Zone border landscape at dawn, with a fence, watchtower and misty mountains
AI-generated illustration

The nuclear and missile forces are where North Korea has genuinely advanced. SIPRI’s Yearbook 2026 estimates about 60 assembled nuclear warheads as of January 2026 — up from 50 a year earlier — with fissile material for about 90, after six nuclear tests, the last in 2017. The missile inventory spans the solid-fuel KN-23 (Hwasong-11Ga), range about 690 km (CSIS Missile Threat), and solid-fuel ICBMs including the Hwasong-18 and the Hwasong-19, tested in October 2024; SIPRI notes no public evidence of an operational ICBM warhead. The navy has about 70 submarines, mostly small coastal and midget types (IISS), plus a new 5,000-tonne destroyer launched in 2025, and the air force’s roughly 840 aircraft (Global Firepower 2026) are mostly ageing Soviet-era types.

MetricFigureSource
Active personnel1.28 millionIISS Military Balance 2026
Reservists600,000IISS Military Balance 2026
Paramilitary (Worker-Peasant Red Guards)5.7 millionIISS Military Balance 2026
Nuclear warheads (assembled)About 60SIPRI Yearbook 2026
Main battle tanksMore than 3,500IISS 2024
Artillery gunsMore than 8,600IISS 2024
Multiple rocket launchers5,500IISS 2024
KN-23 missile rangeAbout 690 kmCSIS Missile Threat

Alliances and posture: the Russia link and the China backstop

North Korea’s most important alliance is now with Russia. The two countries signed a comprehensive strategic partnership treaty in June 2024 with a mutual-assistance clause. Since October 2024, North Korean troops have fought alongside Russian forces in the Kursk region: about 12,000 first deployed, 14,000–16,000 sent in total, about 9,500 still there as of November 2026 (Lowy Institute). In return, Pyongyang has supplied Russia with 12 million artillery shells by July 2025 (Council on Foreign Relations) and, per Ukrainian military intelligence, 148 Hwasong-11A/B ballistic missiles by the start of 2025. Read our intel report on the KN-23 in Russia’s war.

China remains North Korea’s treaty ally (1961 Treaty of Friendship, Cooperation and Mutual Assistance) and economic lifeline, but Beijing has kept its distance from the Russia deployment. Across the border, the US–South Korea alliance is what North Korea’s posture is built to deter: about 28,500 US troops are stationed in South Korea. See our South Korea country profile.

Current developments: missiles, mines and firing positions

On November 7, Russia fired 36 ballistic missiles at Kyiv and the surrounding region; Ukraine intercepted only four. Preliminary Ukrainian findings said North Korean-made KN-23 missiles hit a key energy facility, knocking out substations linking two nuclear power plants to Kyiv. Three days earlier, on November 4, North Korea fired several missiles from the Sondok area toward the East Sea — its fourth launch in a month — hours after Kim Yo Jong ruled out dialogue with Washington until the US abandoned what she called its hostile policy.

On the border, tensions have climbed since September 21, when a mine blast inside the DMZ injured three South Korean soldiers, two seriously. On October 5, a joint South Korean military and United Nations Command investigation concluded the mines were North Korean plastic antipersonnel mines deliberately planted about 10 metres south of the Military Demarcation Line, violating the 1953 Armistice Agreement. North Korea denied responsibility. On October 21, Kim Yo Jong said new firepower units had taken up “firing positions” along the border. Our Korean DMZ profile tracks the standoff, including Seoul’s unanswered offer of military talks.

What to watch next on the Korean Peninsula

Three things matter most: whether forensic work on the November 7 debris confirms the KN-23 finding; whether the DMZ standoff escalates or Seoul’s talks offer gets an answer; and what Pyongyang receives from Moscow — Ukrainian intelligence reports it sought S-400 air defences and has already received a Pantsir-S1. Also read our report on North Korea’s drone push.

Frequently asked questions

How many nuclear weapons does North Korea have?
SIPRI’s Yearbook 2026 estimates about 60 assembled warheads as of January 2026, up from 50 a year earlier, with fissile material for about 90. It has conducted six nuclear tests, the last in 2017.

Are North Korean troops fighting in Russia?
Yes — alongside Russian forces in the Kursk region since October 2024, when about 12,000 were first deployed. The total sent is estimated at 14,000–16,000, with about 9,500 still there as of November 2026 (Lowy Institute).

What happened in the DMZ in September 2026?
A mine blast on September 21 injured three South Korean soldiers. A joint South Korean military and United Nations Command investigation concluded North Korean mines were deliberately planted south of the Military Demarcation Line; Pyongyang denies responsibility.

Sources