The United States and Ukraine were set to continue work on Monday on a plan to end the war with Russia after agreeing to modify an earlier proposal that was widely seen as too favorable to Moscow.

Mass graves and bullet-scarred churches mark the torment of the Kyiv suburb of Bucha under Russian occupation, where traumatised residents now face a new anguish: a U.S.-led peace proposal that would ...

“We are clear on the principle that borders must not be changed by force. We are also concerned by the proposed limitations on Ukraine’s armed forces, which would leave Ukraine vulnerable to future at...