Considering geographic location why might Russia be unhappy with both former Ussr and Warsaw Pact countries joining NATO after the collapse of communism in Europe

The reason why Russia might be unhappy that former USSR and Warsaw Pact countries are joining NATO is that it means NATO is closer to Russia and can attack it more easily.Why is Russia against Eastern European countries joining NATO?Eastern European countries who were part of the USSR and Warsaw Pact, acted as a buffer for Russia, against invading countries in Europe from the West. With these nations now joining NATO, it means that the powers in Western Europe that are in NATO, are now closer to Russia and can attack it with greater ease. Russia does not want this and so is unhappy that these countries keep joining NATO.Find out more on Warsaw Pact at https://brainly.com/question/3665673#SPJ1