Perestroika was the name given to the movement calling for reform of the communist party in the Soviet Union during the 1980s. The ultimate goal was to restructure the political and economic system within the Soviet Union so that it could be more effective and provide for the needs of the Soviet's citizens.
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the time period was through 1095-1492 :)
The 3rd state is probably the answer you're looking for
Hope this helps :)
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The Iron curtain began at the northernmost border of East Germany, Slithering down onto the border of Czechoslovakia, then to Hungary and onto Romania and Bulgaria. Although yugoslavia and Albania were also sattelite states, They were under less influence than the other Eastern Bloc members.