Tu peux check le câble WikiLeaks que j'ai poste plus haut qui date de 2008:
(C) Summary. Following a muted first reaction to Ukraine's intent to seek a NATO Membership Action Plan (MAP) at the Bucharest summit (ref A), Foreign Minister Lavrov and other senior officials have reiterated strong opposition, stressing that Russia would view further eastward expansion as a potential military threat. NATO enlargement, particularly to Ukraine, remains "an emotional and neuralgic" issue for Russia, but strategic policy considerations also underlie strong opposition to NATO membership for Ukraine and Georgia. In Ukraine, these include fears that the issue could potentially split the country in two, leading to violence or even, some claim, civil war, which would force Russia to decide whether to intervene.