Chile was not one of the dominant powers.
Italy
Unfortunately all countries in Eastern were not recently dominant powers in Eastern Europe except the Soviet Union. So many new countries have been created recently that it can be said that all of these were not dominant powers. Problem with question is that in past almost all countries in Eastern Europe were part of or carried name of once dominant powers. Examples are the countries that once were part of one of the world's empires, especially the Holy Roman empire, the Russian empire, the Ottoman empire, Sweden, Austrian-Hungarian empire, the Roman empire, France under Napoleon, the Byzantine empire (lands held in lower Eastern Europe), the Greek empire, or farther back, the Macedonian Empire or the Minoan Empire (the actual extent of which is still not clear). Therefore this question is basically unanswerable unless the definitions within the question are clarified/defined (especially as to what does dominant mean, what time frame is being discussed, and what area constitutes "Eastern Europe".
In order to answer this we need to see a list of countries.
Europe was the center of world power.
the emergence of the US and the USSR as the dominant world powers, supplanting the UK and the other nations of Europe; the division of Germany into East and West; Soviet occupation of Eastern Europe; the end of fascism is a significant political force; (indirectly) the establishment of a Jewish state in Palestine
Western Europe is more powerful than its eastern counterparts for several reasons. The two most important are: 1) After World War 1, the Allied powers really screwed up making a new map of Europe, so when they were done, every eastern European nation had ethnic minorities that would cause a lot of tensions in the future. 2) From 1945-1990, most of Eastern Europe was under communist rule, which stifled economic growth in the region.
No. Hungary, which was part of the mighty Austria-Hungary of the Central Powers in WWI, is in eastern Europe
A series of wars in the 17th and 18th centuries with the Netherlands and France left in 1707, Great Britain) the dominant colonial power in North America and India.
Ownership caused confusion between Europe and Asia.
To Attack the Axis powers one peice at a time
That's why there was a cold war; Different styles of government. Communism verses free world.