The NATO meetings come amid ever growing tensions with Russia, focused both on Russian deployments of nuclear-capable missiles in its Kaliningrad exclave bordering on Poland and Lithuania, as well as Russia's naval buildup in the eastern Mediterranean.
The U.S. is deploying a battalion of Stryker armored vehicles from the Germany-based 2nd Calvary Regiment to Poland as part of the NATO force and will rotate the 3rd Brigade, 4th Infantry Division, equipped with Abrams tanks and other heavy-infantry equipment, to different parts of Eastern Europe including a headquarters unit in Poland.
The U.S. is also sending a force of 330 Marines to a base in Norway, a deployment approved Monday by the Norwegian government.
«We expect a sustained challenge from the East, from Russia, by way of its military activities,» said Douglas Lute, the U.S. ambassador to NATO.
In Brussels this week, NATO defense ministers are expected to also discuss stepped-up coordination with the European Union, as well as French-German proposals to build up European defense capabilities.
Britain and Eastern European countries have opposed a move for the EU to create any sort of common army units or a military headquarters. European defense officials said the current plans would focus on a small civilian military planning group to oversee African operations - an initiative that wouldn't replicate NATO's military branch, the Supreme Headquarters Allied Powers Europe.
Despite its opposition to a military headquarters, Fallon said the U.K.'s commitment to send a battalion along with heavy weaponry should be a sign to Europe that Britain won't abandon its commitment to the continent's defense.
«Although we are leaving the European Union, we remain committed to European security. This is our continent and we will keep on working to help keep it safe,» he said. «We are not stepping away.»