Skip to content
Storiascopio
EN
Back to: Ancient Greece

5 · Ancient Greece politics

The conquests of Alexander

334–323 BC From Macedonia (Pella) to India

In short

Alexander, King of Macedonia at twenty, crossed the Hellespont with his army in 334 BC to attack the Persian Empire. In a few years he conquered Asia Minor, Egypt, Mesopotamia and Persia, reaching as far as the River Indus. He founded many cities bearing his name, the most famous being Alexandria in Egypt. He died in Babylon in 323 BC, aged only 32, and his empire was divided among his generals.

Why it matters His conquests spread the Greek language and culture from the Mediterranean to Central Asia.

Source: Encyclopaedia Britannica, “Alexander the Great”

Illustration: The conquests of Alexander (From Macedonia (Pella) to India)
Illustration created with AI for Storiascopio
The conquests of Alexander: From Macedonia (Pella) to India
Where: From Macedonia (Pella) to India

Study card about 6 minutes of reading

The story

A prince of Pella

Alexander was born at Pella, the capital of Macedon, in July 356 BC. His father was King Philip II, a very able ruler who had turned Macedon into a power and had subdued the Greek cities; his mother was Olympias, a princess of Epirus. As a boy he had Aristotle as his teacher, for about three years. A famous story tells of Bucephalus, a magnificent horse that nobody could ride. Alexander, at about twelve, tamed it, and the horse stayed with him until its death, in 326 BC.

In 336 BC Philip was assassinated, and Alexander, at only twenty, became king. Then, with the Macedonian army, he decided to carry out his father's plan: to attack the Persian empire.

From Greece to Egypt

In the spring of 334 BC he crossed the Hellespont, the strait that separates Europe from Asia, with his army. The first clash was at the river Granicus: he won, although he risked his life (a sword blow to his helmet narrowly missed him), and sent three hundred enemy suits of armour to Athens as a trophy. In 333 BC, at Issus, he faced King Darius III in person. Darius fled from the battlefield and Alexander captured his family. The ancient sources speak of more than a hundred thousand Persians dead, but modern historians think the figure exaggerated; the Macedonians had, according to the historian Curtius Rufus, about 150 dead.

Then the march went on southwards. The Phoenician city of Tyre resisted for about seven months, in 332 BC, and then Alexander took Gaza too. When he reached Egypt, at the end of that year, he was welcomed as a liberator and recognised as pharaoh. Here, in the Nile delta, he founded the city of Alexandria, planned with the help of the architect Dinocrates of Rhodes. It was the first of many cities that bore his name. He also made a long journey across the desert to the oasis of Siwa, where there was an oracle of the god Ammon: the sources do not agree on what the oracle said.

The fall of the Persian empire

On 1 October 331 BC, at Gaugamela, the decisive clash took place. The Persians were far more numerous: ancient historians speak of hundreds of thousands of soldiers, against about 40,000 Macedonian infantry and 7,000 cavalry (modern historians, however, think of many fewer Persians, between 50,000 and 120,000). Alexander won again, and Darius fled. The Macedonian king entered Babylon and Susa, where he seized enormous quantities of silver and gold. In January 330 BC he reached Persepolis, one of the king's palaces, which was devastated by a fire: the sources debate whether it was ordered or accidental. In the summer of the same year Darius III was killed by his own satraps, the governors of the provinces. Alexander found him dead and gave him a royal burial.

Towards India

Alexander did not stop. He pushed into Central Asia, into Bactria and Sogdiana, where he faced revolts that lasted a long time. In 327 BC he married Roxane, the daughter of a local noble, who was sixteen. In the spring of 326 BC he marched towards India. On the river Hydaspes he defeated King Porus in a hard and bloody battle and founded two cities, one of them Alexandria Bucephalus, in honour of his horse.

Further on, on the river Hyphasis, the army mutinied. The men, tired after years of marches and battles, refused to go any further east. Alexander had to give way. He went down the river Indus to its mouth and then turned back, crossing the harsh Gedrosian desert, while a fleet led by Nearchus explored the Persian Gulf.

A sudden end

In 324 BC, at Susa, Alexander organised a great mass wedding: eighty officers married Persian noblewomen and ten thousand veterans married local women. He wanted to unite Macedonians and Persians into a single people. A few months later his dearest friend, Hephaestion, died. Alexander fell ill at Babylon and died on 10 June 323 BC, shortly before turning thirty-three. The cause is still debated today: malaria, typhoid, poisoning and much else have been suggested, but none is certain.

According to tradition, when asked who should succeed him he answered with a confused phrase that can be understood as “to the strongest”. None of his heirs managed to hold the empire together. Wars broke out between his generals, the Diadochi, that is the “successors”. Ptolemy became pharaoh of Egypt, Seleucus founded the Seleucid empire in 305 BC, Cassander governed Macedon from 316 and became its king in 305 BC.

Why it happened

Philip II had created a new, disciplined and powerful army, and had already united Greece under his command. His plan was to bring war to the Persian empire. When he was assassinated, Alexander had no choice but to carry it on.

Alexander's character weighed too: ambitious and brave, he was wounded several times, as at Issus and Gaza, and at the Granicus he risked his life. The vast Persian empire proved more fragile than it seemed: three great battles, the Granicus, Issus and Gaugamela, were enough to change the balance.

What changed

Alexander's empire did not survive his death, but what he had set in motion changed the world. In the conquered lands kingdoms ruled by Greek and Macedonian dynasties arose, the Hellenistic kingdoms, in Egypt, Syria, Mesopotamia and other regions. In the new cities people spoke Greek, built theatres and gymnasia, and people of different nations met and exchanged ideas.

This period is called the Hellenistic age. In cities like Alexandria in Egypt science and letters flourished, with the Library and the Museum, and mathematicians like Euclid appeared. The Greek language became an international language for centuries.

The conquests also had a terrible cost: many cities were destroyed and very many people lost their lives or their freedom. Historians today try not to make Alexander simply a hero: he was a great commander, but his wars brought grief and destruction. Even today his name is legend, and the question of what would have happened had he lived longer fascinates those who study history.

Key people and places

People

Alexander the Great
King of Macedon from 336 BC, died at Babylon in 323: he conquered the Persian empire.
Philip II
His father, king of Macedon, who united Greece under his command.
Darius III
The last king of the Persian empire, defeated at Issus and Gaugamela and killed in 330 BC.
Porus
Indian king defeated by Alexander on the river Hydaspes in 326 BC.
Roxane
Princess of Bactria whom Alexander married in 327 BC.

Places

Pella
The capital of Macedon where Alexander was born.
Alexandria, Egypt
The city founded at the end of 332 BC in the Nile delta, which became a great centre of culture.
Gaugamela
A place in Mesopotamia where the great Persian army was defeated in 331 BC.
Babylon
The great Mesopotamian city where Alexander died on 10 June 323 BC.
River Hydaspes
Site of the battle against King Porus, in north-western India.

Good to know

  • Alexander became king at twenty and died before the age of thirty-three.
  • His horse Bucephalus, according to tradition, was tamed when Alexander was about twelve, and died in 326 BC.
  • After the Battle of the Granicus, Alexander sent three hundred enemy suits of armour to Athens as a gift.
  • Alexandria in Egypt was planned by the architect Dinocrates of Rhodes.
  • At Susa, in 324 BC, a mass wedding was held: eighty Macedonian officers married Persian noblewomen.

Find out more

Related events

Before and after, in the era “Ancient Greece”

Event 21 of 25

All 25 events of the era · Open the big line

Listen / Read next

  • Music to read by: Cinematic JourneyEpic film-style music, no lyrics, by Ciro Simone IrmiciSpotifyYouTube Music

Meanwhile, elsewhere in the world

Other events of the era “Ancient Greece”

Photo of Ciro Simone Irmici

Who's behind this

Ciro Simone Irmici

I'm Ciro Simone Irmici and I build free websites for learning and playing. I built Storiascopio with artificial intelligence and I check every card and every source myself. I'm not a historian: if you find a mistake or would like one more event for your class, write to me.

More of my work: free audiobooks on YouTube · ebooks on Gumroad · Apple Books · music on Spotify and YouTube Music