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 Budapest Memorandum on Security Assurances, by which Russia, the US, and the UK had reaffirmed their obligation to refrain from the threat or use of force against the territorial integrity or political independence of Ukraine. The Russian government said the Budapest Memorandum did not apply due to "complicated internal processes" in Crimea. In March 2015 retired Russian Admiral Igor Kasatonov stated that according to his information the Russian troop deployment in Crimea included six helicopter landings and three landings of IL-76 with 500 people. The Russian–Ukrainian Partition Treaty on the Status and Conditions of the Black Sea Fleet signed