1. The ______ was a system of government in ancient Athens where citizens participated directly.

2. The ______ was the leader of the National Socialist German Workers’ Party during World War II.

3. The ______ was the period of intense rivalry and tension between the USA and the USSR after World War II.

4. The ______ was a series of conflicts between the USA and the Soviet Union during the 1960s.

5. The ______ was the process of rebuilding Europe after World War II, primarily led by the USA.

6. The ancient pyramids are located in ______.

7. The ______ was the process of ending racial segregation and discrimination in the USA during the 1960s.

8. A ______ was an ancient Egyptian ruler often buried in pyramids.

9. The ______ was a document signed in 1215 that limited the power of the English king.

10. The ______ was a famous Renaissance artist known for painting the Mona Lisa.

11. The ______ was the first successful flight of a powered aircraft.

12. A ______ was an ancient Greek philosopher who taught by asking questions.

13. Christopher Columbus sailed to America in the year ______.

14. The ______ was a famous ship that sank on its maiden voyage in 1912.

15. The ______ was a political and social revolution in France in 1789.

16. The ______ was the period of cultural rebirth in Europe from the 14th to the 17th century.

17. The ______ was a major conflict fought between 1914 and 1918.

18. The ______ was the leader of the Soviet Union during World War II.