South Korea says at least 1,500 North Korean special forces in Russia The Washington PostNorth Korea sends 1,500 troops to aid Russia’s war in Ukraine, South Korea’s spy agency says CNNKyiv Demands ‘Strong Reaction’ From Allies To NKorea Deployment Barron’sSouth Korea’s spy agency says North Korea sending troops to Russia Al Jazeera EnglishFor North Korea, War in Ukraine Is a Coveted Chance for Military Practice The New York Times