North Korea is learning valuable lessons from fighting against Ukraine, making it an increased threat to its neighbors, a US official said. In recent months, North Korea has sent around 12,000 troops to fight for Russia against Ukraine as part of a new security pact between its leader,

North Korea benefiting from troops fighting alongside Russia against Ukraine, US says - Pyongyang’s military ties with Russia ‘rendering it more capable of waging war against its neighbours’

Ukraine's president told podcaster Lex Fridman that 3,800 North Koreans had been killed or wounded fighting alongside Russia but many more could come.