When was the Warsaw Pact or, as it is officially called, "The Warsaw Treaty Organization of Friendship, Cooperation, and Mutual Assistance" dissolved?

Explanation

The Warsaw Pact was officially called "The Warsaw Treaty Organization of Friendship, Cooperation, and Mutual Assistance". On paper, it was a military alliance between a number of Eastern European states, but in actual terms, it was more a Soviet underlining of its power over Communist Eastern and Central Europe as it ruled the Pact. The Pact was established on 14 May 1955 as a response to West Germany's integration into NATO and was formally dissolved at a meeting in Prague on 1 July 1991.