Ukrainian President Volodymyr Zelensky thanked Danish lawmakers on Monday for helping his country resist Russia’s invasion, a day after Denmark and the Netherlands announced they will provide Kyiv with American-made F-16 warplanes that could be delivered around the end of the year.

Zelensky told the lawmakers that if Russia’s invasion is successful, other parts of Europe would be at risk from the Kremlin’s military aggression. “All of Russia’s neighbors are under threat if Ukraine does not prevail,” he said in a speech in Copenhagen.