2014 pro-Russian unrest in Ukraine Kiev and Mariupol, were struck by bombings that targeted pro-Ukrainian unity organizations. To maintain control over southeastern territories Ukraine's government started "antiterrorist operation" (ATO) sending armed forces to suppress separatists. Armed conflict between Ukraine's government forces and pro-Russian rebels is known as War in Donbass. Ukraine became gripped by unrest when President Viktor Yanukovych refused to sign an association agreement with the European Union on 21 November 2013. An organized political movement known as 'Euromaidan' demanded closer ties with the European Union, and the ousting of Yanukovych. This movement was ultimately successful, culminating in the February 2014 revolution, which removed
History of Ukraine the Ukrainian parliament on 22 February voted to remove Yanukovych from power (on the grounds that his whereabouts were unknown and he thus could not fulfil his duties), and to free Yulia Tymoshenko from prison. The same day Yanukovych supporter Volodymyr Rybak resigned as speaker of the Parliament, and was replaced by Tymoshenko loyalist Oleksandr Turchynov, who was subsequently installed as interim President. Yanukovych had fled Kiev, and subsequently gave a press conference in the Russian city of Rostov-on-Don. In March 2014, the Annexation of Crimea by the Russian Federation resulted in Crimea being annexed by Russia. Though official results