Annexation of Crimea by the Russian Federation Yanukovych. At the end of the meeting Putin remarked that "we must start working on returning Crimea to Russia". On 23 February, pro-Russian demonstrations were held in the Crimean city of Sevastopol. On 27 February masked Russian troops without insignia took over the Supreme Council (parliament) of Crimea, and captured strategic sites across Crimea, which led to the installation of the pro-Russian Aksyonov government in Crimea, the conducting of the Crimean status referendum and the declaration of Crimea's independence on 16 March 2014. Russia formally incorporated Crimea as two federal subjects of the Russian Federation with effect from 18 March
Annexation of Crimea by the Russian Federation "complete disregard" of the treaty. Both Russia and Ukraine are signatories to the Charter of the United Nations. The ratification of said charter has several ramifications in terms of international law, particularly those that cover the subjects of declarations of independence, sovereignty, self-determination, acts of aggression, and humanitarian emergencies. Vladimir Putin said that Russian troops in the Crimean peninsula were aimed "to ensure proper conditions for the people of Crimea to be able to freely express their will", whilst Ukraine and other nations argue that such intervention is a violation of Ukraine's sovereignty. Russia, United States, United Kingdom and Ukraine