Ukrainian President Volodymyr Zelensky used an address to Denmark's parliament to thank the country for its support, including a pledge to provide Kyiv with F-16 fighter jets.
"When humanity is a value for you and when your values match the values of other nations, you will definitely find all the necessary weapons to defend yourself how we do," Zelensky said Monday.
"I thank you, from all the Ukrainians, from all of us, thank you Denmark for your solidarity, thank you for your help, all the help provided to Ukraine."
The Ukrainian president also warned its European allies that "all of Russia’s neighbors are under threat if Ukraine does not prevail."
"International law will not be resuscitated. Democracies of the world, each of them can become a target either for missiles or for mercenaries or for destabilization," he said. "Ukraine will prevail."
Yurii Ihnat, Ukraine's air force spokesperson, told Ukrainian television that the jets "can change the course of events and provide us with what we need most."
The official said that Russian air superiority was hurting the war effort.
"At this very moment, eight to nine Russian fighter jets are flying freely in the occupied territories. They are dropping guided bombs and launching missiles," Ihnat said. "They will not be able to do this with the F-16s [present]. Air superiority is the key to success on the ground."
He said the first group of pilots in Denmark would be immediately retrained on the F-16. Another group of pilots who had recently graduated will head to the UK to complete a longer program, which will take up to two years.
More on Denmark's pledge: On Sunday, Danish Prime Minister Mette Frederiksen pledged to donate 19 F-16 aircraft to Ukraine between this year and next.
“Today we announce that we will provide 19 F-16 jets to Ukraine, we believe Danish fighter jets will help protect your skies,”
“The aim of this delivery is to protect Ukraine. We plan to provide the jets closer to the new year, about six of them, then eight in the next year and then another five," said Frederiksen alongside Zelensky in a joint press conference at the Skrydstrup airbase in Denmark.
Also on Sunday, Dutch Prime Minister Mark Rutte announced that the Netherlands would provide Ukraine with F-16 aircraft.
Read more about Denmark's pledge.