North Korea has gained exposure to cutting edge battle tactics fighting Ukraine. Military experts told BI South Korea should be worried.

Such a move would have huge ramifications for Russia's full-scale invasion, and far-reaching implications for the international community. "If the Kremlin sends North Korean troops to the territory of Ukraine it would mean that North Korea is in a state of all out war with Ukraine,

South Korea's spy agency says an estimated 4,700 North Korean soldiers have been killed or wounded while fighting alongside Russia against Ukrainian forces