Nanda Empire
Alexander and Porus fought each other at the Battle of the Hydaspes. Alexander was initially set on venturing further into India, but the battle against Porus curbed his aspirations. His army mutinied when faced with opposing the Nanda Empire and their subordinate Gangaridai. According to the Greek historian Plutarch, the previous, costly conflict against Porus's much smaller army contributed significantly to their unease.