in the ankle. According to Curtius, "Not only did Alexander slaughter the entire population of Massaga, but also did he reduce its buildings to rubbles". A similar slaughter then followed at Ora, another stronghold of the Assakenoi. In the aftermath of Massaga and Ora, numerous Assakenians fled to the fortress of Aornos. Alexander followed close behind their heels and captured the strategic hill-fort after the fourth day of a bloody fight. This fight was the challenge Alexander was looking for, an army with huge elephants that were almost able to defeat Alexander. After gaining control of the former Achaemenid satrapy of Gandhara, including the city of Taxila, Alexander advanced into Punjab, where he engaged in battle against the regional king Porus, whom Alexander defeated in the Battle of the Hydaspes in 326 BC, but was so impressed by the demeanor with which the king carried himself that he allowed Porus to continue governing his own kingdom as a satrap. Although victorious, Battle of the Hydaspes was also the most costly battle fought by the Macedonians. East of Porus' kingdom, near the Ganges River, was the powerful Nanda Empire of Magadha. According to the Greek sources, the Nanda army was five times larger than the Macedonian army. Fearing the prospects of facing the powerful Nanda Empire armies and exhausted by years of campaigning, his army mutinied at the Hyphasis River, refusing to march further east. This river thus marks the easternmost extent of Alexander's conquests. As for the Macedonians, however, their struggle with Porus blunted their courage and stayed their further advance into India. For having done all they could do to repulse an enemy who mustered only twenty thousand infantry and two thousand horse, they violently opposed Alexander when he insisted on crossing the river Ganges also, the width of which, as they learned, was thirty-two furlongs, its depth a hundred fathoms, while its banks on the further side were covered with multitudes of men-at-arms and horsemen and elephants. For they were told that the kings of the Ganderites and Praesii were awaiting them with eighty thousand horsemen, two hundred thousand footmen, eight thousand chariots, and six thousand fighting elephants. Alexander spoke to his army and tried to persuade them to march further into India but Coenus pleaded with him to change his opinion and return, the men, he said, "longed to again see their parents, their wives and children,