Question: which states were part of the warsaw pact alliance
Answer: Treaty of Friendship , Cooperation , and Mutual Assistance Russian : Договор о дружбе , сотрудничестве и взаимной помощи Member states in 1990 ( dark green ) Former member states ( light green ) Formation 14 May 1955 in Warsaw , Poland Dissolved 1 July 1991 Type Military alliance Headquarters Moscow , Russian SFSR , Soviet Union Membership Albania ( withdrew in 1968 ) Bulgaria Czechoslovakia East Germany Hungary Poland Romania Soviet Union Supreme Commander Petr Lushev ( last ) Chief of Combined Staff Vladimir Lobov ( last )