South Korea's spy agency estimated last year that around 2,000 North Korean troops had been killed in the Russia-Ukraine war. Since Russia launched its invasion of Ukraine in 2022, North Korea has become a key ally of the Kremlin Key points and original sources are listed below.

• South Korea's spy agency estimated last year that around 2,000 North Korean troops had been killed in the Russia-Ukraine war.S1

• Since Russia launched its invasion of Ukraine in 2022, North Korea has become a key ally of the KremlinS2