When Ukrainian forces crossed the border into Russia’s Kursk region in August, Ukraine’s military commanders hoped that their surprise move would force Moscow to withdraw troops from eastern Ukraine to defend Russia’s own territory. Kyiv did not expect its troops to end up fighting North Koreans.
Neither Moscow nor Pyongyang have officially confirmed that North Korean troops are fighting side by side with Russians. But South Korean intelligence has been reporting on their presence since October, when approximately 1,500 North Korean special forces troops were observed to have arrived in the Russian city of Vladivostok, initially for training.
This group was later joined by another 10,000 or so of their comrades (some of whom are also believed to be from North Korean special forces units). They were then transported nearly 7,000 kilometres across Russia to reach the combat zone.