President Zelensky, the American People of Them With You Every Step of the Way

It seems like an impossible conundrum. Ukraine is valiantly defending itself against the man Boris Johnson called "a blood-stained aggressor" and fighting for survival in a war that is currently deadlocked.

President Zelensky has warned that attempts at talks with The Russian Federation will fail, because Vladimir Putin cannot be trusted. So in the absence of a decisive victory or a negotiated settlement - what happens? James Naughtie investigates how other conflicts have come to a conclusion, in a bid to shed light on a war which has so far defied predictions.

He will talk to key figures who have been in the room as peace deals are ground out - and visit the law makers in Washington DC who are the key source of defence funding for Ukraine. History may have lessons when it comes to a conflict for which there seems no end in sight.

Presented by James Naughtie Produced by Kevin Core