Alexander then marched east to the Hydaspes,

Alexander then marched east to the Hydaspes, where Porus, ruler of the kingdom between the Hydaspes (Jhelum)near Bhera and the Akesines (Chenab) refused to submit to him. The two armies fought the Battle of the Hydaspes River outside the town of Nikaia (near the modern city of Jhelum) and Poros became Alexander's satrap. Alexander's army crossed the Hydraotis and marched east to the Hyphases (Beas).