BRUSSELS — NATO and the European Union are ramping up efforts to persuade China to help get North Korea to stop sending troops and other support to Russia to back its war on Ukraine. Up to 12,000 North Korean troops have been sent to Russia’s Kursk ...

North Korea ratified a major defense treaty with Russia stipulating mutual military aid, the North’s state media reported Tuesday, as the U.S., South Korea and Ukraine say North Korea has sent thousands of troops to Russia to support its war against Ukraine.