Glossary - CIE How Secure Was the USSR's Control Over Eastern Europe, 1948 - 1989?

This glossary is an extract from from a Study Guide by Clever Lili.[https://www.gcsehistory.com/bookstore/cie_igcse_international_relations_ussr_control.html]
The focus question of the sixth unit in the CiE Option B Core Content is ‘How secure was the USSR’s control over eastern Europe 1948 - c1989?’. This unit investigates Soviet power in eastern Europe, and the relationship between the USSR and other communist countries in the area.