Assurances

PARIS — U.S. and Ukrainian officials will continue negotiations on security guarantees for Ukraine after a high-level meeting in Paris produced what leaders called significant breakthroughs, including a U.S.-led truce monitoring mechanism and plans for a European multinational force to deploy in Ukraine once a ceasefire with Russia is agreed. The pledges emerged from the largest gathering yet of the “Coalition of the Willing,” where representatives from 35 countries — including 27 heads of state or government — sought to…