Central and Eastern Europe

Central and Eastern Europe or Central-Eastern Europe (CEE) is a geopolitical term encompassing the countries in Northeast Europe (primarily the Baltics), Central Europe (primarily the Visegrád Group), Eastern Europe, and Southeast Europe (primarily the Balkans), usually meaning former communist states from the Eastern Bloc and Warsaw Pact in Europe, as well as from former Yugoslavia. The Organisation for Economic Co-operation and Development (OECD) also uses the term "Central and Eastern European Countries" (CEECs) for a group comprising some of these countries.

Source: Wikipedia — Central and Eastern Europe (CC BY-SA 4.0)