After the death of
Spitamenes and his marriage to
Roxana (Roshanak in
Bactrian) to cement his relations with his new Central Asian satrapies, in 326 BC Alexander was finally free to turn his attention to the
Indian subcontinent. Alexander invited all the
chieftains of the former satrapy of
Gandhara, in the north of what is now
Pakistan, to come to him and submit to his authority.
Ambhi (Greek: Omphis), ruler of
Taxila, whose kingdom extended from the
Indus to the
Jhelum (Greek:Hydaspes), complied. But the chieftains of some hilly clans including the,
Aspasios and
Assakenois sections of the
Kambojas (
classical names), known in Indian texts as
Ashvayanas and
Ashvakayanas (
names referring to the equestrian nature of their society from the Sanskrit root word Ashva meaning horse), refused to submit.
Alexander personally took command of the shield-bearing guards, foot-companions, archers, Agrianians and horse-javelin-men and led them against the
Kamboja clans—the Aspasios of
Kunar/Alishang valleys, the Guraeans of the Guraeus (
Panjkora) valley, and the Assakenois of the
Swat and
Buner valleys. Writes one modern historian: "They were brave people and it was hard work for Alexander to take their strongholds, of which
Massaga and
Aornus need special mention." A fierce contest ensued with the Aspasios in which Alexander himself was wounded in the shoulder by a dart but eventually the Aspasios lost the fight; 40,000 of them were enslaved. The Assakenois faced Alexander with an army of 30,000 cavalry, 38,000 infantry and 30
elephants. They had fought bravely and offered stubborn resistance to the invader in many of their strongholds like cities of
Ora, Bazira and Massaga. The fort of Massaga could only be reduced after several days of bloody fighting in which Alexander himself was wounded seriously in the ankle. When the
Chieftain of Massaga fell in the battle, the supreme command of the army went to his old mother
Cleophis (q.v.) who also stood determined to defend her motherland to the last extremity. The example of Cleophis assuming the supreme command of the military also brought the entire women of the locality into the fighting. Alexander could only reduce Massaga by resorting to political strategem and actions of betrayal. According to
Curtius: "Not only did Alexander slaughter the entire population of Massaga, but also did he reduce its buildings to rubbles." A similar manslaughter then followed at Ora, another stronghold of the Assakenois.
In the aftermath of general
slaughter and
arson committed by Alexander at Massaga and Ora, numerous
Assakenian people fled to a high fortress called
Aornos. Alexander followed them close behind their heels and captured the strategic hill-fort but only after the fourth day of a bloody fight. The story of Massaga was repeated at Aornos and a similar
carnage on the tribal-people followed here too.
Writing on Alexander's campaign against the Assakenois,
Victor Hanson comments: "After promising the surrounded Assacenis their lives upon capitulation, he executed all their soldiers who had surrendered. Their strongholds at Ora and Aornus were also similarly stormed. Garrisons were probably all slaughtered.”
Sisikottos, who had helped Alexander in this campaign, was made the governor of Aornos. After reducing Aornos, Alexander crossed the Indus and fought and is believed to have won an epic battle against a local ruler
Porus (original Indian name Raja Puru), who ruled a region in the
Punjab, in the
Battle of Hydaspes in 326 BC.
After the battle, Alexander was greatly impressed by Porus for his bravery in battle, and therefore made an alliance with him and appointed him as satrap of his own kingdom, even adding some land he did not own before. Alexander then named one of the two new cities that he founded,
Bucephala, in honor of the horse who had brought him to India, who had died during the
Battle of Hydaspes. Alexander continued on to conquer all the headwaters of the Indus River.
East of Porus' kingdom, near the
Ganges River (original Indian name Ganga), was the powerful empire of
Magadha ruled by the
Nanda dynasty. Fearing the prospects of facing another powerful Indian army and exhausted by years of campaigning, his army mutinied at the
Hyphasis River (the modern
Beas River) refusing to march further east. This river thus marks the easternmost extent of Alexander's conquests:
Alexander, after the meeting with his officer
Coenus, was convinced that it was better to return. Alexander was forced to turn south. Along the way his army ran into the
Malli clans (in modern day
Multan). The Malli were the most warlike clans in South Asia during that period. Alexander's army challenged the Malli, and the ensuing battle led them to the Malli citadel. During the assault, Alexander himself was wounded seriously by a Malli arrow. His forces, believing their king dead, took the citadel and unleashed their fury on the Malli who had taken refuge within it. Following this, the surviving Malli surrendered to Alexander's forces, and his beleaguered army moved on. He sent much of his army to
Carmania (modern southern
Iran) with his general
Craterus, and commissioned a fleet to explore the
Persian Gulf shore under his admiral
Nearchus, while he led the rest of his forces back to Persia by the southern route through the
Gedrosian Desert (now part of southern
Iran and
Makran now part of
Pakistan).
Alexander left forces in India however. In the territory of the Indus, he nominated his officer
Peithon as a
satrap, a position he would hold for the next ten years until 316 BC, and in the
Punjab he left
Eudemus in charge of the army, at the side of the satrap
Porus and
Taxiles. Eudemus became ruler of a part of the Punjab after their death. Both rulers returned to the West in 316 BC with their armies. In 321 BCE,
Chandragupta Maurya founded the
Maurya Empire in India and overthrew the Greek satraps.