Some 10,000 American troops are currently based in Poland. Mr. Rutte spoke with urgency on Wednesday about the need to step up NATO’s game. The episode underscores the need for NATO to beef up its defenses against modern drone warfare and learn the lessons from Ukraine. Numerous NATO countries believe that once the fighting in Ukraine ends, Russia would be prepared to test NATO itself in the next five years, said Andrius Kubilius, the European Union defense commissioner and former Lithuanian prime minister. And they saw the influx of Russian drones into Poland as a provocation and a warning.