Russia's war in Ukraine ignited the most serious security crisis in Europe since the end of World War II, and prompted the continent to make unprecedented decisions on security, defense and EU enlargement under the pressure of a new reality and fear of death and destruction, even an all-out nuclear war and the rollback of Western military and political hegemony. The importance of this context is reinforced by the restoration of the Atlantic promises to the Russians at the beginning of the nineties of the last century, when the first batches of including Eastern countries in the alliance were launched, and the assurances of NATO leaders that Russia would not be encircled. After that, Russia felt the West's pulse regarding the possibility of joining itself, and then participated in the "Partnership for Peace" program, and was subsequently ignored, without ignoring the other eastern countries that were included in four batches. However, while neither Russia nor NATO wants war with the other side, both of them used rhetoric to escalate tensions, so could Ukraine be a starting point for more security changes on the continent?