<P> The recorded history of Jhelum (Urdu: تاريخ جہلم ‬ ‎), a district of modern - day Pakistan, covers thousands of years . It has since its creation been dominated by Persian, Greek, Hindu, Buddhist, Muslim, Sikh and British influences to present - day Pakistan . </P> <P> Jhelum is near the site of the famous Battle of the Hydaspes between the armies of Alexander the Great and Raja Porus . This battle took place a few miles downstream from the city centre, along the river banks . The city was founded to commemorate the death of Alexander's horse, Bucephalus, and was originally called Bucephala . Nearby there is also the historic 16th century Rohtas Fort, another historic fort since Sikh era located at the backside of main bus stand near Railway Phatak Jhelum City now being used as stores under Railway Authorities and also Tilla Jogian; a centuries - long history of the area . </P> <P> The history of the district dates back to the semi-mythical period of the Mahabharata . Hindu tradition represents the Salt Range as the refuge of the five Pandava brethren during the period of their exile, and every salient point in its scenery is connected with some legend of the national heroes . Modern research has fixed the site of the conflict between Alexander and Porus as within Jhelum district, though the exact spot at which the Macedonian king effected the passage of the Jhelum (or Hydespes) has been hotly disputed . </P>

Which ruler fought on banks of the jhelum river