Annexation of Crimea by the Russian Federation Prime Minister, Dmitry Medvedev, declared that Crimea had been fully integrated into Russia. Until 2016 these new subjects were grouped in the Crimean Federal District. On 8 August 2016, Ukraine reported that Russia had increased its military presence along the demarcation line. In response to this military buildup Ukraine also deployed more troops and resources closer to the border with Crimea. The Pentagon has downplayed a Russian invasion of Ukraine, calling Russian troops along the border a regular military exercise. On 10 August, Russia claimed two servicemen were killed in clashes with Ukrainian commandos, and that Ukrainian servicemen had been
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