His naval forces were limited, while Persia could call on those of Egypt, Phoenicia and the Asian-Greeks, meaning his base in Macedonia and mainland Greece was vulnerable (which is why Alexander targeted those provinces first).
He lacked the funds to pay his army over a long period of campaigning (he captured the Persian treasury after the battle of Issus which gave him the funds to hire more troops and pay their food for the final push on Persia).
Feeding his army and horses in a pre-motorised age was extremely difficult (which is why he timed his campaigns with the harvest seasons).
Matching the Persian cavalry superiority (which is why he established a system of linking his superior armoured infantry with his cavalry through light infantry).
Alexander the great was Greek.
No, Alexander the great is not single.
Yes, Alexander The Great was an explorer
Alexander the Great was the king of Macedonia.
he was Alexander the third his successor was Alexander the forth. ... Alexander the fourth was the 13-year old son of Alexander the Great
Alexander the great was Greek.
Alexander The Great
No, Alexander the great is not single.
Alexander the great of Greece conquered the world.
Yes, Alexander The Great was an explorer
Alexander the Great of Course
Alexander the Great was the king of Macedonia.
Alexander the great's mentor was Aristotle
Yes, Alexander the great was a scholar.
he was Alexander the third his successor was Alexander the forth. ... Alexander the fourth was the 13-year old son of Alexander the Great
Alexander the Great's teacher was Aristotle.
The name of Alexander the Great's child was Alexander IV of Macedon.