Timeline of the annexation of Crimea by the Russian Federation March 3 after the announcement of partial military mobilization in Ukraine and is believed to have been abducted. He was found dead with signs of torture; his hands were handcuffed and his head was covered in duct tape. The Treaty on Accession of the Republic of Crimea to Russia is signed, formally joining the self-declared independent Republic of Crimea to the Russian Federation as two federal subjects - the Republic of Crimea and the federal city of Sevastopol. One Ukrainian soldier and one pro-Russian soldier were killed in the Simferopol Incident. Crimean Deputy Prime Minister Rustam Temirgaliyev said in an
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