NATO:
In 1949, the United States and 11 other Western nations were afraid the further Communist expansion, so they created the North Atlantic Treaty Organization (NATO).
Its original members were Belgium, Canada, Denmark,France, Iceland, Italy, Luxembourg, the Netherlands,Norway, Portugal, the United Kingdom, and the United States.
THE WARSAW PACT
The Soviet Union and its Communist nations in Eastern they created an alliance, the Warsaw Pact, in 1955.
The formation of the Warsaw Pact was a response from Communist countries to the creation of NATO.
AFTER THE COLD WAR:
When the Soviet Union dissolved and became the Russian Federation