Today marks three years since the start of Russia's full-scale invasion of Ukraine. From early fears of a swift Russian victory to the Kharkiv offensive and the slow war of attrition that has played out since, each stage of this war has been hard to predict. None more so than this stage, with the USA drastically changing tack and tearing up the transatlantic alliance by pursuing back-channel peace talks with Putin. Europe has been left scrambling. Where do we go from here? And with an isolationist USA, the breakdown of the European consensus on Ukraine and the UK's armed forces being hollowed out, who is left to defend Europe?

James Heale speaks to Katy Balls and Keir Giles, a senior consulting fellow at Chatham House.

Produced by Oscar Edmondson.