The United States has 100,000 service members operating in Europe, the largest number in nearly two decades, as the Pentagon shifts forces in the wake of Russia’s war on Ukraine. The last time troop levels were this high in Europe was in 2005, according to U.S. European Command records. EUCOM …

Russian President Vladimir Putin’s war in Ukraine and his push to upend the broader security order in Europe may lead to a historic shift in American thinking about defense of the continent. Depending on how far Putin goes, this could mean a buildup of U.S. military power in Europe not …

Ukraine said it saw possible room for compromise in talks with Russia despite Moscow’s stepped up bombardment Tuesday of Kyiv and new assaults on the port city of Mariupol, from where an estimated 20,000 civilians managed to flee through a humanitarian corridor. The fast-moving developments on the diplomatic front and …