What countrys were under communist rule?

There were many countries under communist rule, especially through the 20th century. These countries are:

1) Afghanistan

2) Albania

3) Angola

4) Benin

5) Bulgaria

6) Cambodia

7) Congo

8) Czechoslovakia

9) East Germany

10) Ethiopia

11) Hungary

12) Mongolia

13) Mozambique

14) Poland

15) Romania

16) Somalia

17) South Yemen

18) USSR

19) Yugoslavia