Long ago, many countries made a pact. 

Long ago, many lands joined together. 
Some lands joined the pact. These lands were in Europe.
Sometimes, things were not easy. The Soviet Union sent troops to some lands. This happened in places like Hungary.
Later, many people wanted change. They worked for new ways to live. This caused the group to fall apart.
By 1991, the pact was gone. It is interesting to see how groups change over time. 
The Warsaw Pact was a group of countries. 
This group formed to balance a group called NATO. NATO was a group of Western countries. The Soviet Union feared a stronger West Germany. They thought a rearmed Germany could be a threat.
The pact was a military alliance. This means the countries promised to help each other. Sometimes, the Soviet Union used its power within the group. In 1956, Soviet forces went into Hungary. In 1968, they entered Czechoslovakia. 
By the late 1980s, things began to change. People in many lands wanted new ways to live. This led to revolutions in 1989. Some countries, like East Germany, left the group. In February 1991, the pact ended. 
The Warsaw Pact was a very important military group. 
This group worked as a military alliance. It was the military side of a larger system. The economic side was called Comecon. The Soviet Union was the most powerful leader in the pact. It held much control over the other member states. Moscow led the Communist parties in these different lands. Many of these countries followed orders from the Kremlin. The Soviet Union even used its power to keep control. For example, Soviet forces entered Hungary in November 1956. 
The history of the pact began in the mid-1950s. It was created because of changes in West Germany. West Germany joined NATO in early May 1955. This made the Soviet Union very worried. They feared a rearmed Germany could be a threat. Because of this, they formed their own group. The treaty was signed in Warsaw, Poland. 
Many countries were part of this alliance. The Soviet Union joined with seven other nations. These included Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, and Romania. 
The pact began to fall apart in the late 1980s. This happened because of the Revolutions of 1989. One big change started with the Solidarity movement in Poland. The movement had electoral success in June 1989. Another event was the Pan-European Picnic in August 1989. East Germany left the pact after German reunification in 1990. Finally, the pact ended in February 1991. Six remaining members met in Hungary to end it. Most of these countries later joined NATO.
The Warsaw Pact was a collective defense treaty formed during the Cold War. Its formal name was the Treaty of Friendship, Cooperation and Mutual Assistance. It served as a military alliance for several socialist republics in Central and Eastern Europe. The pact functioned as a military complement to Comecon, which was an economic organization for the Eastern Bloc. 
The creation of the pact was a direct response to changes in West Germany. In early May 1955, the Federal Republic of Germany joined NATO. This rearmament of West Germany caused great concern for the Soviet Union. Soviet leaders feared that a rearmed Germany could become a military threat. They viewed the integration of West Germany into NATO as a danger to European peace. 
The treaty was officially signed on May 14, 1955, in Warsaw, Poland. The Soviet Union joined with seven other nations to establish the pact. These founding members were Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, and Romania. The Soviet Union held dominant power within this organization. Moscow controlled the Communist parties that ruled the various satellite states. This meant that most member nations followed orders from the Kremlin. Some historians noted that the Soviet Union already held political domination over these states before the pact began.
Control was maintained through both political and military means. The Soviet Union entered into bilateral 20-year treaties with several members. These treaties allowed Soviet troops to be deployed in countries like Poland, East Germany, Romania, and Hungary. 
The economic relationship between the Soviet Union and its members was also significant. The Soviet Union exacted war reparations from countries like Bulgaria, Hungary, Romania, and East Germany. It used Soviet-dominated joint enterprises to manage these resources. Historians estimate the net outflow of resources from Eastern Europe to the Soviet Union was very large. In the first decade after World War II, this amount was roughly $15 billion to $20 billion. This sum was nearly equal to the total aid the United States provided to Western Europe through the Marshall Plan.
The alliance began to unravel during the late 1980s. This period saw the spread of the Revolutions of 1989 across the Eastern Bloc. In Poland, the Solidarity movement achieved electoral success in June 1989. Another major event was the Pan-European Picnic in August 1989. These movements signaled a shift in political power. East Germany withdrew from the pact following German reunification in 1990.
The Warsaw Pact officially ceased to exist on February 25, 1991. The defense and foreign ministers of the six remaining member states met in Hungary. They issued a joint declaration to end the alliance. Shortly after, the Soviet Union itself was dissolved in December 1991. In the decades that followed, the geopolitical map changed once again. Most former Warsaw Pact countries, including the Baltic states, eventually joined NATO. This included the Czech Republic, Slovakia, and the newly unified Germany.
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