What Is 2021 North Korean missile tests

Overview

North Korea's 2021 missile testing campaign marked a significant escalation in its military development efforts, breaking a self-imposed pause in long-range testing observed since 2018. The country conducted multiple launches throughout the year, demonstrating advancements in both range and delivery systems despite ongoing diplomatic stagnation and international sanctions.

These tests included short-range ballistic missiles, cruise missiles, and new submarine-launched variants, indicating a diversified strategy aimed at enhancing deterrence and evading missile defense systems. The frequency and technological sophistication of the launches signaled Pyongyang’s intent to modernize its arsenal regardless of external pressure.

• March 21, 2021: North Korea launched two short-range ballistic missiles from Kanggye, with a range of approximately 430 kilometers, targeting waters off its east coast.
• May 21–22, 2021: Two additional short-range missiles were fired from Hamgyong Province, reaching about 450 kilometers and flying for roughly 200 seconds.
• September 15, 2021: Pyongyang tested its first known submarine-launched ballistic missile (SLBM), the Pukguksong-3, from waters near Sinpo.
• October 28, 2021: A new long-range cruise missile was tested, flying 1,500 kilometers for over two hours before hitting its target.
• December 2021: North Korea confirmed the development of a solid-fuel propulsion system, which allows for faster launch preparation and greater mobility.

How It Works

North Korea’s missile tests in 2021 showcased advancements in propulsion, guidance, and launch platforms, reflecting a shift toward more survivable and precise weapons systems. Each test provided data for refining missile accuracy, range, and stealth capabilities, particularly against U.S. and allied defenses in the region.

• Short-Range Ballistic Missiles (SRBMs): These missiles, like the KN-23 and KN-24, have ranges under 1,000 kilometers and mimic the trajectory of intermediate missiles to complicate interception.
• Submarine-Launched Ballistic Missiles (SLBMs): The Pukguksong-3 test in September demonstrated a cold-launch ejection system, allowing missiles to be fired from submerged platforms.
• Cruise Missiles: The October test involved a terrain-following cruise missile capable of evading radar by flying low, with a range of 1,500 km.
• Solid-Fuel Propulsion: Unlike liquid-fueled systems, solid-fuel missiles can be launched faster and stored longer, increasing operational readiness and survivability.
• Mobile Launchers: Many 2021 tests used transporter-erector-launchers (TELs), which enhance concealment and reduce vulnerability to pre-emptive strikes.
• Warhead Design: Missiles tested in 2021 likely carried mock or lightweight warheads, simulating re-entry conditions for future nuclear-capable variants.

Comparison at a Glance

The table below compares key 2021 North Korean missile tests by type, range, launch method, and strategic implications:

The 2021 tests highlight North Korea’s focus on diversifying its delivery systems to ensure survivability and penetration of enemy defenses. By combining mobile launchers, submarine platforms, and low-flying cruise missiles, Pyongyang aims to create a layered deterrent that complicates U.S. and allied military planning in the region.

Why It Matters

The 2021 missile tests underscore North Korea’s commitment to advancing its strategic weapons despite stalled diplomacy and economic hardship. These developments have far-reaching implications for regional security, arms control, and U.S. defense posture in East Asia.

• Regional Instability: Frequent launches heightened tensions with South Korea and Japan, prompting increased joint military drills with the U.S.
• Missile Defense Challenges: The use of maneuvering re-entry vehicles and low-altitude cruise missiles complicates interception by systems like THAAD and Aegis.
• Diplomatic Stalemate: The tests occurred amid frozen negotiations, signaling Pyongyang’s lack of willingness to denuclearize without concessions.
• Technological Leap: Solid-fuel and SLBM advancements suggest North Korea is nearing a reliable second-strike nuclear capability.
• Global Proliferation Risks: Success in missile tech could encourage sharing with other rogue states or non-state actors.
• U.S. Strategic Response: The Biden administration responded with sanctions and cyber operations, but no major diplomatic breakthroughs followed.

North Korea’s 2021 missile activities represent a calculated effort to strengthen its military leverage while testing the resolve of the international community. As development continues, the window for diplomatic resolution narrows, increasing the risk of miscalculation in an already volatile region.