The Ukrainian military and Russian-backed separatists in eastern Ukraine accused each other on January 1 of violating a shaky holiday truce between the warring sides.
Russia says it's suing Ukraine for defaulting on a $3 billion Eurobond debt owed to Moscow.
After grappling with migrants and rising right-wing politicians in 2015, the European Union may be in for more of the same -- and perhaps some new surprises -- in 2016.
Ukraine's free-trade agreement with the European Union has come into force, coinciding with the start of Moscow's food embargo against Kyiv.
Ukrainian police are blaming saboteurs yet again for blowing up an electricity pylon that shut down electricity for at least one quarter of the residents of Crimea.