c. 411 B.C.: The democracy of Athens is overthrown by extremists, who are in open negotiation with Sparta. These extremists are soon overthrown, and the Athenian navy defeats the Spartan navy a few months later.

Today: Greece is a united country at this time, with no city-state attempting to seize control over the country.

c. 411 B.C.: The war between Sparta and Athens has continued for twenty years. The Peloponnesian War will end in 404 B.C., with Athens' defeat.

Today: Greece, which has been dominated by military coups and turmoil with neighboring Turkey since the end of World War II, is no longer considered a dominant military force.

c. 411 B.C.: In 429 B.C., a plague killed one third, and perhaps as many as two thirds of the population of Athens. Because of this plague, many Athenians ceased to believe in their gods, and...