According to US sources, the US would send about 3,000 more soldiers to Poland and Romania to protect Eastern Europe from a potential spillover from the situation over Russian forces massing near Ukraine.

On Wednesday, Russia mocked Britain, calling Prime Minister Boris Johnson "utterly bewildered" and accusing British MPs of "stupidity and ignorance," indicating that it was not in the mood for compromise.

Moscow has stationed around 100,000 troops on Ukraine's borders and has threatened to take unspecified military action if its demands are not satisfied, including a guarantee from NATO that Kyiv would never be admitted.

According to the Pentagon, a Stryker squadron located in Vilseck, Germany, would be dispatched to Romania, while roughly 1,700 troops, mostly from the 82nd Airborne Division, will be sent from Fort Bragg, North Carolina, to Poland. Another 300 servicemen will relocate from Fort Bragg to Germany.

According to media sources on Twitter, US President Joe Biden said the deployment was in line with what he had informed Russian President Vladimir Putin: "As long as he continues acting aggressively, we're going to make sure we can convince our NATO partners and Eastern Europe that we're there."

The goal, according to Pentagon spokesman John Kirby, was to send a "strong signal" to Putin "and frankly, to the world" that NATO is important to the US and its partners.

"We know that (Putin) also bristles at NATO, about NATO. He's made no secret of that. We are making it clear that we're going to be prepared to defend our NATO allies if it comes to that. Hopefully, it won't come to that."

The deployment of the United States, according to Poland's Defense Minister Mariusz Blaszczak, is a powerful statement of unity. Jens Stoltenberg, NATO Secretary-General, praised it, saying the alliance's reaction to Russia was defensive and proportional.