European leaders met in London to form a plan to help end the war in Ukraine. But even potential peacekeepers face political and economic hurdles.

In a war dominated by the unexpected, few imagined Ukraine’s fourth year at war would so firmly now question the security of all of Europe.

British Prime Minister Keir Starmer urged European leaders on Sunday (March 2) to step up their defense efforts to not only help secure peace in Ukraine but stability across the continent at a summit staged as a show of support for President Volodymyr Zelenskiy.