He first established firm control over the Greek city-states to protect his home base of Macedonia, and be a source of manpower.
He then set about capturing the Mediterranean eastern seaboard to remove the threat of Persian naval invasion of Greece and Macedonia.
He then defeated the Persians in two major battles - Issus and Gaugamela, breaking their unified power.
With coordinated opposition broken, he then defeated the remaining Persian eastern provinces one by one.
There were several. The most decisive was Gaugamela.
when he defeat the king darius 3
Gaugamela.
Alexander the Great decisively defeated the Persians led by Darius the Third at Gaugamela (located in Iraq) October 1, 331 BC .
Alexander the Great defeated Darius, king of Persia in 331 BCE. This was at the battle Gaugamela, he did march through Bactria in 329 BCE, but he had already defeated the Persians.
I'm almost positive that he defeated the Persians at the Battle of Gaugamela.
no
Alexander the Great lead the Greeks to defeat the Persians. After doing so, Alexander conquered many other lands and created the largest empire the world has ever seen at the time. He built many cities named after himself (Alexandria), but the most well-known Alexandria was in Egypt where he built a lighthouse 394 feet tall (120 meters). Alexander was one of the greatest conquerors in history.
Alexander's empire had no contact with Central Europe. The Persians remained in Persia.
They did npt defeat Athens.
Cyrus did not defeat the Persians. Cyrus, as a Persian himself, actually gave them an empire.
The attack was no surprise - the two armies were confronting each other. Alexander wanted to defeat the Persian army to gain control of the Persian empire.