Donald Trump’s administration is expected to present a long-awaited plan to end the war in Ukraine at the Munich Security Conference next week.

Under the motto “Peace Through Dialogue,” the conference at Munich has become a key platform for security talks and initiatives. Mr. Trump’s envoy, Keith Kellogg, a retired lieutenant general, is to use the conference to outline a peace proposal to an expected audience of 350 security decision-makers from 70 countries.