What if Prague Spring in Czechoslovakia managed to spread to other Warsaw Pact nations? How could've the mass protests managed to get more support in other countries thus making it harder for Soviets to put it down? And what happens once it's impossible to invade Czechoslovakia since the Warsaw Pact countries are too busy trying to put down the riots in their own places? How does Brezhnev respond and what happens to the Soviet Union itself? How would the U.S. and NATO react to these anti-communist revolts that seem to be growing even larger?