What was the manifestation of participation in the hostilities of the Macedonian?

We know from history such an outstanding political figure as Alexander the Great. In the 4th century BC. he is leading a major march to the east. During the military campaign, the Greek army, thanks to his talent as a commander, manages to defeat the troops of the Persians, and, thus, bring a huge state to its knees. Then the Greco-Macedonian army was able to go on a campaign against India.