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 the 31st Separate Airborne Assault Brigade dressed in Berkut uniforms), established security checkpoints on the Isthmus of Perekop and the Chonhar Peninsula, which separate Crimea from the Ukrainian mainland. Within hours, Ukraine had effectively been cut off from Crimea. On 1 March 2014, Aksyonov declared Crimea's new "de facto" authorities would exercise control of all Ukrainian military installations on the peninsula. He also asked Russian President Vladimir Putin, who had been Yanukovych's primary international backer and guarantor, for "assistance in ensuring peace and public order" in Crimea. Putin promptly received authorisation from the Federation Council of Russia for a Russian