Gaugamela.
The battle of Gaugamela in 331 BCE finally broke the Persian army resisting Alexander the Great's invasion.
Alexander and his army entered the heartland of Persia in 334 BCE. After his victory at the Battle of Granicus, he moved deeper into Persian territory, ultimately aiming to conquer the Persian Empire. This marked the beginning of his campaign against King Darius III and the Persian forces.
The King of Persia defeated by Alexander was Darius. After losing the battle of Gaugamela Darius was murdered by his own nobles.
He defeated the Persians at the battle of issus.
Egypt . ! (:
Alexander the Great didn't conquer cities, unless you are talking about the Greek city states he conquered to unite Greece under his hegemony. Alexander conquered the Persian Empire and took over all its holdings which included Egypt and capitulated without a battle, and then fought Porus in modern day Pakistan with intentions to push forward into India.
Alexander the Great conquered Persia and extended his empire into parts of India, notably defeating King Porus at the Battle of the Hydaspes in 326 BCE. However, he did not conquer China; his campaigns did not reach that region. After reaching the Indian subcontinent, his troops eventually refused to march further east, leading to his return to Babylon. Thus, while he achieved significant conquests, China remained outside his empire.
Guagamela
Battle of the issues, Alexander then because more harsh and started to go on a killing streak and tried to conquer all the places he could
In the 300s BC, Persia was conquered by Alexander the Great, the king of Macedonia. After a series of decisive battles, including the Battle of Granicus, the Battle of Issus, and the Battle of Gaugamela, Alexander defeated the Persian king Darius III. This conquest marked the fall of the Achaemenid Empire and the expansion of Alexander's empire across much of the known world. Alexander's campaigns significantly influenced the cultural and political landscape of the regions he conquered.
True,
Darius cut off Alexander's line of retreat and communications back to the Greek mainland in an effort to end Alexander's invasion of Persia.