In 2014, Russia annexed Crimea and began backing separatists in eastern Ukraine. The ensuing war has now killed over 13,000 people. Leveraging contacts on both sides and engaging local and foreign actors, including in the Western states to which Kyiv looks for support, Crisis Group encourages and reports on negotiations to end the war and assesses its human costs and threats to Ukraine's and Ukrainians' security. Our advocacy, written products and visual explainer describe this conflict's evolving dynamics and identify ways to facilitate prospects for peace and a reunified Ukraine.