Final answer:
The countries of East Europe share a historic similarity in the influence of communism and the Soviet Union. Many Eastern European countries were under Communist rule or heavily influenced by the Soviet Union until its collapse in 1991. Additionally, there is a cultural emphasis on preserving and uniting around a common heritage in most Eastern European countries.
Step-by-step explanation:
One historic similarity that the countries of East Europe share is the influence of communism and the Soviet Union. During the 20th century, most of the Eastern European countries were under Communist rule or heavily influenced by the Soviet Union.
When the Soviet Union collapsed in 1991, these countries declared independence and began the process of integration into the European community.
An example of this historic similarity is the Czech Republic and Slovakia, which were formerly part of the same country of Czechoslovakia. On January 1, 1993, they became two newly independent nations. Slovakia is known officially as the Slovak Republic.
Another historic similarity is the cultural dynamics that make each region or country unique. In most Eastern European countries, there is a strong emphasis on preserving and uniting around a common heritage. This cultural force has brought people together to publicly support the move to unite and hold onto a heritage that is as old as Europe itself.