North Korean leader Kim Jong-un reviewed a rare exhibition of weapons systems and vowed to build an “invincible” military, as he accused the United States of being the “root cause” of instability, writes The Guardian, writes The Guardian.

In an apparent continued effort to drive a wedge between Washington and Seoul, Kim also said his drive to build up his military isn’t targeted at South Korea and that there shouldn’t be another war pitting Korean people against each other.

Kim gave the speech Monday at the “Defense Development Exhibition Self-Defense-2021”, an event meant to mark the previous day’s 76th birthday of the ruling Workers’ party. South Korean media reported it was the first such event held by North Korea.