The Methods of Russia's Encounter with Nato's Development to the East

After collapse of the Soviet Union in 1991, the East Europe countries were one of the problems that become as a trouble for Western European countries and America and at that time these countries (East Europe) were a membership of verso treaty.
For these countries, it was necessary to delivered them to join the Western European during a long- term program, so that they cannot be leagued once more with Russia on any conditions in the future .So the development of Nato to the East is pursued at that time. Nato’s development to the East is unnecessary by Russia and knows it as a treaty for his national security.
These two developments are into opposition to each other for more than two centuries, but the scale of policy is in far out of Westerners, because up to now , nine countries of Eastern Europe and three countries that become as an organ of Nato and were a part of Soviet territory (Litvani , Letoni , Estonia) for a time .
This paper attempts to explore that the styles of Russia’s cooperation with Nato’s development to the East , and also studding the possible method’s between Russia and Nato.