<P> The Battle of the Hydaspes was fought in 326 BC between Alexander the Great and King Porus of the Paurava kingdom on the banks of the river Jhelum (known to the Greeks as Hydaspes) in the Punjab region of the Indian subcontinent (modern - day Punjab, Pakistan). The battle resulted in a complete Greek victory and the annexation of Punjab, which lay beyond the far easternmost confines of the already absorbed Persian Empire, into the Macedonian Empire . </P> <P> Alexander's decision to cross the monsoon - swollen river despite close Indian surveillance, in order to catch Porus' army in the flank, has been referred to as one of his "masterpieces". Although victorious, it was also the most costly battle fought by the Macedonians . The resistance put up by King Porus and his men won the respect of Alexander, who asked Porus to become one of his satraps . </P> <P> The battle is historically significant for opening up the Indian subcontinent to Ancient Greek political (Seleucid, Greco - Bactrian, Indo - Greek) and cultural influences (Greco - Buddhist art), which continued to have an impact for many centuries . </P> <P> The battle took place on the east bank of the Hydaspes River (now called the Jhelum River, a tributary of the Indus River) in what is now the Punjab Province of Pakistan . Alexander later founded the city of Nicaea on the site; this city has yet to be discovered . Any attempt to find the ancient battle site is complicated by considerable changes to the landscape over time . For the moment, the most plausible location is just south of the city of Jhelum, where the ancient main road crossed the river and where a Buddhist source mentions a city that may be Nicaea . The identification of the battle site near modern Jalalpur / Haranpur is certainly erroneous, as the river (in ancient times) meandered far from these cities . </P>

Who won the war between porus and alexander in hindi