Members of the mostly European 'coalition of the willing' discussed security cooperation for Ukraine on Tuesday, and top NATO generals were also to broach the topic on Wednesday. Key issues include the role of the US and a possible mutual assistance clause.

Ukraine and its European allies have been buoyed by Trump's promise during a summit on Monday of security guarantees for Kyiv, but many questions remain unanswered. Officials told Reuters that the Pentagon is carrying out planning exercises on the support Washington could offer beyond providing weapons.

Trump gave his assurance that no American soldiers would be sent to protect Ukraine as part of a peace deal with Russia

President Donald Trump is offering his assurances that U.S. troops won’t be sent to help defend Ukraine against Russia