Nanda Empire
East of Porus's kingdom, near the Ganges River (the Hellenic version of the Indian name "Ganga"), was the powerful Nanda Empire of Magadha and the Gangaridai Empire of Bengal. Fearing the prospects of facing other powerful Indian armies and exhausted by years of campaigning, his army mutinied at the Hyphasis River (the modern Beas River), refusing to march further east.