Telegram / @Tsaplienko Russian soldiers have been filmed giving North Korean troops battlefield training and language lessons, with some of Kim Jong-un’s men picking up swear words. In one video, a small group of Pyongyang’s soldiers preparing to head to the front line is shown how to lay landmines by Moscow’s military instructors.

North Korean soldiers deployed to the Kursk region of Russia have begun combat operations against Ukrainian troops, the U.S. State Department confirmed Tuesday.