According to Section IX of Ukraine’s 1990 Declaration of State Sovereignty:
The Ukrainian SSR solemnly declares its intention of becoming a permanently neutral state that does not participate in military blocs and adheres to three nuclear free principles: to accept, to produce and to purchase no nuclear weapons.
They've declared nato intentions before crimea annexation, its the whole reason lol
now, now let's not let facts get in the way of sanctimonious liberal rage