Security guarantees have become a central focus in discussions about a peace deal for Ukraine , with the country’s President Volodymyr Zelensky saying at the White House Monday that they are the “key issue, a starting point for ending the war.”

Zelensky knows that in the long run, Russia’s superior numbers and weaponry will grind down Ukrainian resistance. So he has long insisted that any agreement must provide Ukraine with promises that the US and Europe will prevent the Russians from resuming their assault in a year or two.

Here’s what to know about this crucial part of any deal to end the war in Ukraine.

What might security guarantees look like and who is involved?

First, this is uncharted territory: the “Coalition of the Willing,” a group of key Ukrainian allies, is still working

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