How the Kremlin decided on the invasion of troops into Czechoslovakia
On the night of August 20-21, 1968, Czechoslovakia was occupied by the armies of the five Warsaw Pact countries, the decision to intervene having been made by the collective party leadership of the Soviet Union a few days before the invasion. The supporters of a solution by force in the Kremlin eventually convinced the undecided members of the Politburo and the armies moved in on their instructions.