Kim Jong Un Inspects New Nuclear Submarine and Oversees Missile Test

The timing of these military reveals coincided with a personal message from Russian President Vladimir Putin, which was also reported by KCNA. Putin hailed the "invincible friendship" and "militant fraternity" between Moscow and Pyongyang, specifically praising the efforts of North Korean soldiers in Russia’s Kursk region. This diplomatic backdrop suggests that North Korea’s rapid progress in submarine technology may be bolstered by technical assistance or blueprints provided by Russia.