The #Brezhnev Doctrine "was announced to retroactively justify the #Soviet invasion of #Czechoslovakia in August #1968 that ended the #PragueSpring, along with earlier Soviet military interventions, such as the invasion of #Hungary in 1956. These interventions were meant to put an end to liberalization efforts and uprisings that had the potential to compromise Soviet #hegemony inside the Eastern bloc, which was considered by the Soviets to be an essential #defensive and strategic #buffer in case hostilities with #NATO were to break out." http://en.wikipedia.org/wiki/Brezhnev

The #Brezhnev Doctrine "was announced to retroactively justify the #Soviet invasion of #Czechoslovakia in August #1968 that ended the #PragueSpring, along with earlier Soviet military interventions, such as the invasion of #Hungary in 1956. These interventions were meant to put an end to liberalization efforts and uprisings that had the potential to compromise Soviet #hegemony inside the Eastern bloc, which was considered by the Soviets to be an essential #defensive and strategic #buffer in case hostilities with #NATO were to break out." http://en.wikipedia.org/wiki/Brezhnev_Doctrine