Aunified group of countries, the communist bloc, was located in what world region?
eastern europe
western europe
soviet union
eastern asia

The answer to your question is Eastern Europe.

Following World War II, Russia (or the Soviet Union as it was called at the time) created a number of satellite countries for itself in the region of Eastern Europe. All of them shared the characteristic of being communist and were considered to be a part of the Communist bloc. The reason why the Soviet Union did this was because they wanted to create a buffer zone between them and the Western powers.