Washington has rallied around the Western-leaning Ukrainian government and Russia supported the separatists, who favor closer ties with Moscow.
Russia Gets Hacked: Payback's a Borscht
Ukrainian hackers posted emails showing Russia's involvement in the separatist movement that has waged war in Ukraine.
Ukraine Puts Army on Alert as Russia Heats Up Crimea Stalemate
Ukraine's president put his army on combat alert Thursday as a war of words between Russia and Ukraine heated up the conflict over annexed Crimea.
Ukraine's Nadiya Savchenko Swapped for 2 Russians: Lawyer
A military pilot dubbed Ukraine's "Joan of Arc" has been released after two years behind bars in an exchange for two Russian prisoners of war.
Ukraine's Embattled Prime Minister Arseniy Yatsenyuk Resigns
Ukraine's embattled prime minister announced Sunday that he is resigning, opening the way for the formation of a new government.
Russia Jails Ukrainian National Hero Nadiya Savchenko for 22 Years
A Ukrainian army officer was convicted of murdering civilians on Tuesday by a Russian court.
Ukrainian Military Pilot Nadiya Savchenko Faces Russian Verdict
Moscow accuses 34-year-old Iraq veteran Nadiya Savchenko of involvement in the killing of two Russian civilians during the civil war in Ukraine.