The history has been altered by the Europeans specifically British to meet their own ends. If we read history carefully we will find Purus was not a even a King just a local warlord. The following information also appears bogus : On the other hand, the Indian army led by Chandragupta Maurya had 600,000 infantry, 30,000 cavalry, 9,000 war elephants. Its impossible to control over such an army effectively even in today's era even with all advanced C4ISTAR capabilities forget . Most of the individual appear to be just camp followers.