1987 - it was clear that gorbachev's policies would have major effects : because the problems within communism were so great , his policies were no longer about reform but rather about wholesale change
Gorbachev made a significant speech to the council of europe in july 1989 in which he announced that the brezhnev doctrine was dead - communist countries could no longer rely on the USSR for life support
He had in 1988 informed the warsaw pact defence ministers that there was no possibility of USSR military intervention in the manner of the invasion of czechoslovakia