In his early campaigns he always maintained a considerable fleet of warships and supplies for his soldiers .
In less than two years Alexander secured the Greek and Thracian borders and gathered an army of 50,000 men for the assault on Asia .
In Alexander 's early campaigns Alexander always maintained a considerable fleet of warships and supplies for his soldiers .
In less than two years Alexander secured the Greek and Thracian borders and gathered an army of 50,000 men for the assault on Asia .