For the past year, Ukraine has been plunged into chaos. Mass protests against pro-Moscow President Viktor Yanukovych led to his ouster in February 2014. That sparked a spiraling crisis: a fledgling interim government in Kiev looked on as Russia first seized and then annexed the territory of Crimea, a strategic Black Sea peninsula. A pro-Russian separatist insurgency in eastern Ukraine, believed to have direct backing from Moscow, has led to the deaths of thousands since.