The United States Air Force will be sending six F-22 Raptors fighter jets to Poland to support NATO’s “air shielding” mission on its borders as Russia continues its aggression in Ukraine.

According to a statement from US Air Forces in Europe and Air Forces Africa, the fifth-generation stealth fighter jets of the 90th Fighter Squadron recently landed in England from Alaska. They will soon soar to the skies towards the 32nd Tactical Air Base in Lask, Poland.

The “air shielding” mission is part of NATO’s initiative to bolster its eastern borders’ air and missile-defense capabilities and provide a shield “from the Baltic to the Black seas,” it added.

This is a follow-through from the Madrid Summit Declaration earlier this summer, attended by world leaders and convened to develop a new strategy for NATO’s “deterrence by reinforcement” model. NATO Secretary General Jens Stoltenberg said the new strategy is “the biggest overhaul [of] our collective defense since the end of the Cold War.”