King Darius III got defeated by Alexander the great and by other conquerors who I don't know about
Alexander The Great
Notably , it was Alexander the great , the king of Macedon who defeated the Persian king Darius the 3rd .
Darius III.He defeated Darius III 13 times in battle.
Darius iii.
Darius III.
The Persian army of Darius III.
Alexander the Great and his Macedonians defeated the Persian armies of Darius III at Gaugamela.
The King of Persia defeated by Alexander was Darius. After losing the battle of Gaugamela Darius was murdered by his own nobles.
There is a strong suspicion the he was defeated by King Poros of Pauravas in India, or at least it was a draw - otherwise his transferring of his own ally King Taxiles' kingdom to Poros is inexplicable.
Darius III was born in -380.
Darius III died in -330.
Darius was the third king of the Persian Empire and the father of Xerxes I (the king of Persia mentioned in 300). He was the first Persian to attempt to invade Greece and was ultimately defeated at the Battle of Marathon in 490 BC.