Chanakya impressd upon Chandragupta the importance of proper academic education for a person who was an aspirant to the throne.
Some historians believe that Chanakya took Chandragupta to Taxila and got him graduated from that universtiy. Others dismiss this theroy on the ground that Taxila was already taken over by Greek armies of Alexander and it no more existed. They say that the teachers of the Taxila University had dispersed in the wake of the alien invasion. There occured a minor diasphora of intellactuals. Chanakya was able to contact some of the teachers and employed them to impart academic education to Chandragupta.
Whatever the exact technicality, it is very true fact that Chandragupta got educated academically, trained as a soldiers and thought the political manipulations and strategies by Chanakya. This programe took 7-8 years.
The Greek army meanwhile was pressing eastwards having conquerd the western kingdoms of India. One by one the kingdoms were falling to the marauding aliens. Chanakya and Chandragupta studied the battle stratigies employed by Greeks army and the administrative machineries they set up in the conquered lands. They also noted the weaknesses of the native rulers and their outdated methods of warfare. The biggest shortcoming of the Indian kings was their failure to set up effective administration.
It is believed that for practical experience Chanakya got Chandragupta recruited in the Greek unit along with some others who were to learn the spying techniques. Chandragupta was to learn the working of the Greek army and their battle planning.
The Greek used to administer the conquered land through a designatd commander called Satrap. There was a chain of Satraps who were running the vanquished kingdoms. Over a period the Greek soldiers were losing appetite for war. They were getting home sick. Alexander too was not keeping well in Indian conditions. Forced by these factors Alexander decided to abandon his world conquest mission and return home leaving behind Satraps to rule the lands.
But the conditions were becoming hostile for Satraps also.
Then, news arrived that Alexander had died of illness on his way back near Babylon. It spelled doom for other Satraps. They were killed or dislodged one by one. All these events took place in 302-327 B.C.
Some other Greek commanders fled or tried to rule the lands by aligning with native kings or local armies to throw up new combinations. Some of them even joined the service of the various local kings and settled down having married the local girls. Several of the Satraps were Indians who declared themselves independent rulers of the lands they governed.
Chanakya and Chandragupta took great part in elimination of the Greek Satraps employing every trick of the trade, ruse, disguise and manipulation as detailed in the following chapter.