South Korean president Yoon Suk Yeol has vowed that his government ‘won’t sit idle’ following reports that North Korea has sent three thousand troops to support Russia in its war against Ukraine. In a meeting with the Polish president, Yoon said that this deployment violates UN resolutions and threatens global security. South Korea’s spy agency says North Korea aims to send up to ten thousand troops to Russia by the end of 2024, though both Moscow and Pyongyang deny the claims. In response, Yoon indicated that South Korea is preparing diplomatic, economic, and military countermeasures in collaboration with allies, including possibly providing Ukraine with weapons systems. While South Korea has so far only supplied Ukraine with non-lethal aid, the situation may prompt a shift in policy. Tensions in the Korean peninsula have intensified as North Korea has reportedly used Russia's invasion of Ukraine as an opportunity to enhance its nuclear and missile programmes. The two leaders also discussed expanding defence cooperation, including new arms deals for Polish military upgrades. See