Read the text and answer the questions.

The Warsaw Pact (formally, the Treaty of Friendship, Co-operation, and Mutual Assistance, sometimes, informally WarPac, akin in format to NATO) was a collective defense treaty among Soviet Union and seven Soviet satellite states in Central and Eastern Europe in existence during the Cold War. The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (CoMEcon), the regional economic organization for the communist states of Central and Eastern Europe. The Warsaw Pact was created in reaction to the integration of West Germany into NATO in 1955 per the Paris Pacts of 1954, but it is also considered to have been motivated by Soviet desires to maintain control over military forces in Central and Eastern Europe. 

While the Warsaw Pact was established as a balance of power or counterweight to NATO, there was no direct confrontation between them. Instead, the conflict was fought on an ideological basis. Both NATO and the Warsaw Pact led to the expansion of military forces and their integration into the respective blocs. The Warsaw Pact's largest military engagement was Warsaw Pact invasion of Czechoslovakia (with the participation of all Pact nations except Romania and Albania). The Pact failed to function when the Revolutions of 1989 spread through Eastern Europe, beginning with the Solidarity movement in Poland and its success in June 1989.

1. Were NATo and the Warsaw Pact enemies of each other?
2. What was their relationship to one another?
3. Who invaded Czechoslovakia?
4. Did all members participate?
5. How many satellite states were involved in the Pact?
6. Where were these states located?
7. What was the regional economic organization for communist states in this area called?
8. And what did that organization compliment?
9. What is the Pact's informal nickname?
10. And its formal name?
11. When was it created?
12. As a result of what country joining Nato?
13. Is the Warsaw Pact formatted similarly to NATO?
14. What did the Soviets seek to control during the Pact's creation?
15. Could this be considered one of the reasons the Pact was formed?
16. When did the Pact end?
17. In which country was the beginning of the end?
18. With what occuring?
19. Was that movement ultimately successful?
20. What was spreading through parts of Europe at this time?
21. Which part of Europe was affected?

Numbered answers:
1. No
2. They both led to the expansion of military forces and their integration into the respective blocs.
3. Warsaw Pact
4. all Pact nations except Romania and Albania
5. seven
6. Central and Eastern Europe
7. Council for Mutual Economic Assistance (CoMEcon)
8. The Warsaw Pact
9. WarPac
10. the Treaty of Friendship, Co-operation, and Mutual Assistance
11. 1955
12. West Germany
13. Yes
14. military forces in Central and Eastern Europe
15. Yes
16. June 1989
17. Poland
18. the Solidarity movement
19. Yes
20. the Revolutions of 1989
21. Eastern Europe