Timeline of the annexation of Crimea by the Russian Federation deputies, Federation Council members, heads of Russian regions and civil society representatives in the Kremlin, calling for the creation of "two new constituent entities within the Russian Federation: the Republic of Crimea and the city of Sevastopol". Russian soldiers storm Ukrainian military bases in Crimea. At Sevastopol, a tug from the Black Sea Fleet attacked and damaged the Ukrainian corvette "Ternopil" by launching grenades at the ship while circling around. Verkhovna Rada of Ukraine passes a resolution to adopt a bill on "territorial integrity of the Ukrainian people", which overlooks the status of granting Ukrainian visas to certain Russian citizens,
Annexation of Crimea by the Russian Federation also signed the Budapest Memorandum on Security Assurances, by which all these countries reaffirmed their obligation to respect the territorial integrity of Ukraine (including Crimea) and to refrain from the threat or use of force against the territorial integrity or political independence of Ukraine. According to the Constitution of Russia, the admission of new federal subjects is governed by federal constitutional law (art. 65.2). Such a law was adopted in 2001, and it postulates that admission of a foreign state or its part into Russia shall be based on a mutual accord between the Russian Federation and the relevant state