Ukraine is a goner

Even NATO and the United States will not risk a World War for the sake of Ukraine, despite Russia's abrogation of the Budapest Memorandum on Security Assurances for Ukraine:

http://en.wikipedia.org/wiki/Nuclear_weapons_and_Ukraine

The Budapest Memorandums[edit]

Main article: Budapest Memorandum on Security Assurances

On December 5, 1994 the leaders of Ukraine, Russia, Britain and the United States signed a memorandum to remove nuclear weapons in Ukraine. They all signed six agreements for Ukraine, the agreements are:^[2]

1. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm their commitment to Ukraine, in accordance with the principles of the Final Act of the Conference on Security and Cooperation in Europe, to respect the independence and sovereignty and the existing borders of Ukraine;
2. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm their obligation to refrain from the threat or use of force against the territorial integrity or political independence of Ukraine, and that none of their weapons will ever be used against Ukraine except in self-defence or otherwise in accordance with the Charter of the United Nations;
3. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm their commitment to Ukraine, in accordance with the principles of the Final Act of the Conference on Security and Cooperation in Europe, to refrain from economic coercion designed to subordinate to their own interest the exercise by Ukraine of the rights inherent in its sovereignty and thus to secure advantages of any kind;
4. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm their commitment to seek immediate United Nations Security Council action to provide assistance to Ukraine, as a non-nuclear-weapon State party to the Treaty on the Non-Proliferation of Nuclear Weapons, if Ukraine should become a victim of^[2] an act of aggression or an object of a threat of aggression in which nuclear weapons are used;
5. The Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America reaffirm, in the case of Ukraine, their commitment not to use nuclear weapons against any non-nuclearweapon State party to the Treaty on the Non-Proliferation of Nuclear Weapons, except in the case of an attack on themselves, their territories or dependent territories, their armed forces, or their allies, by such a State in association or alliance with a nuclear-weapon State;
6. Ukraine, the Russian Federation, the United Kingdom of Great Britain and Northern Ireland and the United States of America will consult in the event a situation arises that raises a question concerning these commitments.^[2]