Pairis took Helen to Troy and then her husband went to war with Greece.
Then a war raged on and one of the heroes were Achilles.
The war lasted about 10 years.
The Messenian War was the longest running war in ancient Greek history. Even though the war stopped and started over the centuries, hostilities between the states of Laconia and Messenia were constant, even to the point of Sparta officially declaring war on Messenia every year, regardless of their current relationship
Darius the first
Darius I, King of Persia, decided he wanted to conquer the Greeks in 490 BC. He gathered a vast army of soldiers that outnumbered any army the Greeks could muster. They boarded the Persian fleet and headed to Greece. The Greeks won (Sparta and Athens).
Xerxes son of Darius the first wanted to get his revenge on the Greeks. He got a huge army of over 200,000 soldiers and 1,000 warships.
Sparta emerged victorious, while the constant fighting left Athens bankrupt, exhausted and demoralized. Neither city-state regained the military strength they once had.
was a conflict triggered by Sparta's attempts to impose her dominance over the rest of Greece, and that ended with Spartan defeat that marked the beginning of the end for Sparta as a great power.
Alexander set out for Egypt. He was sidelined at Gaza, however, and forced to endure another lengthy siege. After several weeks, he took the town and entered Egypt where he established a city.