The eight member countries of the Warsaw Pact pledged the mutual defense of any member who would be attacked. Relations among the treaty signatories were based upon mutual non-intervention in the internal affairs of the member countries, respect for national sovereignty, and political independence. However, almost all governments of those member states were indirectly controlled by the Soviet Union.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): How many countries formed the initial Warsaw Pact membership?
eight