The war was between the Persian Empire and a confederation of independent Greek city-states 499-449 BCE. It took place in the Eastern Mediterranean littoral.
The Persian Empire, which he turned into an empire of his own.
All of them, so he could take over all of the Persian Empire.
Persian Empire.
yes
The conquest of the Balkans, the Ottoman beylik was transformed into a transcontinental empire.
He captured the eastern Mediterranean ports to eliminate the Persian navy threat and then defeated the Persian armies.
Persia
He planned to take over the Persian Empire. However he was assassinated on the eve of departure and his son Alexander took over and did the job.
Greece was devastated, paving the way for Macedonia to take control, and use the combined resources 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.
Northwestern India (today's Pakistan) was included in the Persian Empire in 521 BCE. By 331 BCE the Persian Empire ceased to exist after it's defeat by Alexander the Great, who continued on to India and made a failed attempt to take over India.