Question

what happened when the czechs tried to implement liberal reforms in 1968?
the communist government was forced to step down.
slovakia protested and blocked the proposed changes.
the ussr and other warsaw pact nations invaded.
czechoslovakian residents gained new civil liberties.

Explanation:

In 1968, when the Czechs tried to implement liberal reforms (Prague Spring), the Soviet Union was afraid of the spread of liberal ideas and the weakening of its influence in the Eastern Bloc. The Warsaw Pact was a military alliance led by the USSR. The Soviet - led Warsaw Pact invasion was a direct response to halt the liberalization process. The communist government did not step down immediately due to the invasion; Slovakia was part of Czechoslovakia at that time and did not act independently to block the changes in this context; the invasion led to the suppression of the reforms rather than the residents gaining new civil liberties.

Answer:

The USSR and other Warsaw pact nations invaded.