United Kingdom Prime Minister Keir Starmer said he was prepared to deploy troops to Ukraine if needed, hours before European leaders meet in Paris on Monday to address Washington’s shock policy shift on the war.

United States President Donald Trump sidelined Kyiv and its European backers last week by calling his Russian counterpart Vladimir Putin to talk about beginning negotiations to end the conflict.

With Trump saying he could meet Putin “very soon,” European leaders are hastening to Paris for top-level talks on the continent’s security.

Describing a “once-in-a-generation moment,” Starmer said he was willing to put “our own troops on the ground if necessary.”

“Any role in helping to guarantee Ukraine’s security is helping to guarantee the security of our continent, and the security of this country,” he wrote in the Daily Telegraph late Sunday.

US defense chief Pete Hegseth also appeared to rule out Ukraine joining NATO or retaking all of its territory lost since 2014.

Leaders from the UK, Germany, Italy, Poland, Spain, the Netherlands and Denmark are expected at the Paris meeting, which falls ahead of the third anniversary of Russia’s invasion of Ukraine on 24 February.

Antonio Costa, who heads the European Council representing the European Union’s 27 nations, EU chief Ursula von der Leyen, and NATO secretary general Mark Rutte will also be present.

The French presidency said the meeting would address “the situation in Ukraine” and “security in Europe.”

“Because of the acceleration of the Ukrainian issue, and as a result of what US leaders are saying, there is a need for Europeans to do more, better and in a coherent way, for our collective security,” an adviser from President Emmanuel Macron’s office said.