Because it was bequeathed to him by his father Philip II of Macedonia. The plan was Philip's, but on the eve of his departure he was assassinated. His son Alexander then took over the project.
Philip decided to conquer the Persian Empire because, having brought mainland Greece under control, Persia offered a target for his boundless ambition. His son Alexander inherited boundless ambition.
From 334 to 331 BCE.
Ten years
From 334 to 327 BCE.
He began in 334 BCE and finished in ten years.
He created alliances with many greek city-states
From 334 to 331 BCE.
to conquer his enemies land
The Persian Empire.
He followed his assassinated father Philip's plan to take over the Persian Empire.
It took him ten years to conquer the Persian Empire and turn it into an empire of his own.
Ten years
From 334 to 327 BCE.
The Persian Empire - he inherited the plan from his assassinated father Philip II.
The Persian Empire stretching from Libya to Central Asia.
He began in 334 BCE and finished in ten years.
He created alliances with many greek city-states
Alexander the Great defeated the Persian empire