Poland has invoked Article 4 of the North Atlantic Treaty, calling for consultations with fellow NATO members, including the United States, after at least 19 Russian drones flew deep into Polish territory overnight Tuesday. The incursion prompted Polish and NATO forces to scramble fighter jets as authorities closed major airports. On Wednesday, Polish Prime Minister Donald Tusk told Parliament, “This situation brings us the closest we have been to open conflict since World War II.” In Kyiv, Ukrainian President Volodymyr Zelensky slammed Western leaders for what he called a “lack of action” against Russia, calling the drone incursion another provocation by Moscow.

President Volodymyr Zelensky: “From the first hour of the night, our military recorded Russian drones moving toward the Polish border. And this movement was not an accident or mistake, but deliberate movement. The Russians used both our territory and Belarusian territory to push them into Polish airspace.”

This weekend, Belarus is set to play host to major joint military drills of Russian and Belarusian forces. They’re the first such war games since early 2022 — right before Russia’s full-scale invasion of Ukraine.