THE MARCH FROM THE HYPHASIS (BEAS) TO THE HYDASPES (Jhelum) marked the beginning of the long road home. This is not to say that there were no more battles to be fought or hardships to be endured, but it was clear to all that Alexander had established the Indus river system as the eastern limit of his empire. Thus he reasserted the claims of the Achaemenid kings, if only for a short while. Little did he know that the collapse of the Nanda dynasty was imminent and the Mauryan kingdom of Chandragupta (Sandrocottus) was destined to subjugate the Punjab and the Indus lands to the south. At the time, it seemed prudent to secure Porus' realm against the threat of hostile neighbors, namely the Sudracae and Mallians, but in the long run Alexander's actions may have weakened the Punjab in the face of new enemies to the east.

All newly acquired territories east of the Hydaspes were given to Porus. Alexander received Abisares into alliance and assigned to him control of Hazara, where Arsaces remained as satrap; furthermore, he had broken the resistance of others who opposed Porus – the so-called Cowardly Porus and the Cathaeans – and now directed his energies against the tribes to the south. Porus retained the rank of king and enjoyed expanded territories and fewer restrictions on his power than Taxiles, who remained under the watchful eye of Philip son of Machatas.