We have the name of only one tribal chief, Astes, in the Peucelaotis region (the Yusufzai country) who ventured to offer resistance, and paid for it with his life. His city was captured after thirty days, and in his place was installed Sangaios (Sanjaya ?) who had quarrelled with him some time before and gone over to Taxiles...
The route taken by Alexander along the Khoes is not easy to follow in its details, but doubtless his operations led him for a considerable distance up the large and populous valley of the Kunar, where he fought many hard battles. In an encounter before the first important city taken by the invaders, Alexander was slightly wounded in the shoulder. The city was razed to the ground and all its inhabitants, excepting those who managed to escape to the hills, were put to the sword. Craterus and some other infantry officers were left behind to complete the subjugation of the district, while Alexander advanced to attack the Aspasians, who abandoned their capital on hearing of his approach, and were pursued with great slaughter to their mountain refuges.
Alexander then crossed the mountains to the east and entered the Bajaur valley. Here Craterus rejoined him after carrying out his orders, and was asked to find fresh inhabitants for the city of Arigaion which occupied an advantageous site, but had been burnt down and deserted by its original residents. Meanwhile Ptolemy, the son of Lagos, spotted the main Indian camp ...
the Indians descended from the high ground they held to meet the invader on the plain below and sustained a defeat; the number of prisoners taken by the conqueror is said to have been no less than 40,000; then were captured also 230,000 oxen, from which Alexander chose the best to be sent over to Macedonia for use in agriculture...Alexander appeared before Massaga, ‘the largest city in those parts'. Thus began the war in the upper Swat region against the Assakenoi....the Greek engines of war battered down the defences and inflicted great losses on the besieged, and their chief fell on the fourth day ‘struck by a missile from an engine'. Among the besieged were 7,000 mercenary troop who had no inclination to continue the arduous defence, especially after the death of the ruler of the city, and they started negotiations with Alexander; they were allowed to hill, leave the city, arms in hand, and encamp on a neighbouring on condition that they changed sides and accepted service under Alexander. But they had no wish to aid the foreigner against their countrymen and planned an escape by night to their homes; Alexander heard of this, surrounded their camp and cut them to pieces. Diodorus and Plutarch state that Alexander’s conduct on this occasion was a ‘foul blot on his martial fame’; he had made separate peace with the mercenaries to escape the serious losses they inflicted on his forces, and then fell upon them treacherously. Massaga itself, deprived of its best defenders, was taken by storm, and according to Arrian, the mother and daughter of its ruler became prisoners of war. Curtius records a story that the queen of the city, who had an infant son whom she placed on Alexander’s knees was treated indulgently by the conqueror, rather owing ‘to the charms of her person than to pity for her misfortunes'. He adds that afterwards she gave birth to a child who received the name of Alexander. Justin mentions that the Indians called the queen ‘the royal harlot'....
Bazira, which stood on a lofty eminence and was strongly fortified, offered resistance to Koinos... Alexander directed his march to that city first, and ordered Koinos to join him there after fortifying a position before Bazira and leaving there a garrison strong enough 'to keep the inhabitants from undisturbed access to their lands’. A sortie by the defenders of Bazira after the departure of Koinos was unsuccessful and they were confined more rigorously than before within the walls their city. Ora was captured at the first assault with little loss to the invader, who took over all the elephants he found there. The news of the fall of Ora led the inhabitants of Bazira to abandon their city at dead of night and seek refuge in the more inaccessible heights of the neighbouring mountains....
Alexander then spent some days reducing minor strongholds, some on the way to the Indus, and some on its right bank, accompanied by two local chieftains Kophaios and Assagetes (Asvajit ?)....
Before crossing the Indus, Alexander had still to deal with the last stronghold of the Assakenoi at Aornos to which they had all flocked for refuge...
Seeing the extraordinary skill with which these daring operations were carried out and the success which attended them, the Indians began to feel that further resistance was hopeless and sent a messenger to Alexander offering to surrender the rock if he granted them terms of capitulation. While the negotiations were dragging on, the besieged formed plans of dispersing to their several homes under cover of night; Alexander saw this, allowed them to begin their retreat without any obstruction, and then with a picked body of seven hundred troops scaled the rock at the point abandoned by the defenders. The surprise was complete; many of the Indians were slaughtered, and many others fell over the precipices and were dashed to death; ‘Alexander thus became master of the rock which had baffled Herakles himself....
From Aornos, records Arrian, Alexander went in pursuit of the fleeing defenders of Aornos, who were led by a brother of the Assakenian chief killed in Massaga. The fugitives had taken refuge in the mountains with an army and some elephants. When Alexander reached Dyrta he found the city and its environs deserted, and thereupon he detached certain troops to reconnoitre the surrounding country and secure information about the enemy, particularly his elephants....From captives Alexander learned that the Indian prince had crossed the Indus and taken refuge with Abhisares, leaving his elephants at pasture near the Indus. These he succeeded in capturing with a loss of only two animals killed in the chase by their falling down a precipice....
Only Porus (Paurava), bearer of a great name coming down from the age of the Rigveda, sent a defiant reply to Alexander’s message and said he would meet the invader at the frontier of his territory, but in arms....
When he saw the prince advancing, Alexander thought that Porus was approaching with his whole army and sent the horse-archers to reconnoitre. When he discovered the real strength of the advancing force he charged with all his cavalry and overwhelmed it; 400 Indians fell, Porus’ son among them. The chariots were no help on ground loosened by the rain and fell into the hands of the enemy, horses and all...
The engagement now became crowded into a narrow space, and the elephants being pressed from all sides became uncontrollable; many of them lost their drivers, and maddened by wounds, they turned their fury against friend and foe quite indiscriminately. The Macedonians who retained a wide and open field on the whole suffered less from the elephants as they eluded their attack by giving way when they charged, and followed them and plied them with darts when they retreated. At length many of the elephants were killed and the rest spent with wounds and toil, ceased to be formidable. Then Alexander ordered a general charge of horse and foot and the battle ended in a decisive victory for him. By this time the Macedonian divisions on the right bank had crossed over, and being fresh, were employed in the pursuit of the retreating Indians on whom they inflicted great slaughter...
When Alexander took the field again with a select division of horse and foot, he invaded the land of the Glausai or Glauganikai (Glauchukayanas) as they were called, a free tribe on the western bank of the Akesines (Chenab) living in thirty-seven cities of between five and ten thousand inhabitants each and a multitude of villages. These people were now placed under the rule of the Paurava against whom they had maintained their independence for so long...
Alexander crossed the Ravi and entered the land of the Kathaians (Kathas), who were among the best fighters in the Punjab and had gathered their allies for the defence of their fortified capital, Sangala (not yet identified). These warlike Kshatriya tribes had proved their mettle a short time before against Porus and Abhisares when they marched against them; would they prevail against the new-comer from farther west? Within two days of his crossing the Ravi, Alexander had received the submission of Pimprama (unidentified), the city of the Adraistai (Adhrshtas or, according to Jayaswal, Arishtas), But the Kathaians of Sangala camped under shelter of a low hill outside the city and offered a determined resistance from behind a triple barricade of wagons. Finding his cavalry of no avail against the enemy, Alexander led the infantry on foot and after much hard fighting, compelled the Indians to seek refuge behind the city walls. Alexander now closely invested the city, and Porus joined him with a force, of 5,000 Indians and several elephants; the besieged made a plan of escape by night across a shallow lake on one side of the city, but it was betrayed to Alexander, who fell upon the fugitives and forced them back into the city, after inflicting losses on them. Military engines then began to batter the walls, but before a breach was effected, the Macedonians carried the walls by escalade. The city was taken, many of the Kathaians were killed, and more taken prisoner. The desperate nature of the fighting is clear; the Greek accounts admit an unusually large number of slain and wounded in Alexander’s army; and Alexander razed the city to the ground. The inhabitants of two neighbouring cities, the allies of the Kathaians, escaped a similar fate by abandoning their cities in good time.
The Malloi (Malavas) and the Oxydrakoi (Kshudrakas) were getting ready to give a hostile reception to the invader, and Alexander wanted to press on quickly and attack them before they completed their dispositions...
Alexander himself landed with a body of picked troops and made an inroad against the Siboi (Sibis) and the Agalassoi (Agrasrenis) to prevent their joining the powerful confederacy of the Malloi lower down the river. The Sibis, a wild people clad in skins and armed with clubs, who claimed descent from the soldiers of Hercules, made their submission when Alexander encamped near their capital. Their neighbours, the Agalassoi, were not so amenable; they had mustered an army of 40,000 foot and 3,000 horse and offered battle. They fought in the field and in the streets of their city, and many Macedonian soldiers fell; this roused the fury of Alexander, who set fire to the city and massacred large numbers of the inhabitants, condemning many others to slavery; a bare 3,000 sued for mercy and were spared....Alexander planned a great drive against the tribal confederations of the Malavas, and their allies, the Kshudrakas who lived farther to the East along the Beas. While he himself with his favourite troops would deliver the main attack, Hephaestion, who had gone in advance, and Ptolemy, who was to follow behind, would prevent the enemy's attempts to escape in either direction....
Alexander struck across fifty miles of waterless desert and completely surprised the first city of the Malavas he came against; the men, who were abroad in the fields unarmed, offered no resistance and were simply butchered; the rest were shut up in the city, guarded by a cordon of cavalry round the walls till the infantry came up. Then Perdiccas was sent forward to the next city, which he was to invest without attempting to storm the place till Alexander came up. The first city was now carried by assault, the citadel in the centre of it holding out somewhat longer; practically all the garrison were killed. Meanwhile Perdiccas reached the city against which he had been sent, and found it deserted; he rode in hot pursuit of the fugitives and overtook and killed some, but the bulk of them managed to escape him to the marshes of the river and beyond.
Soon Alexander came up and joined the pursuit; many of the Malavas were overtaken and slain while crossing the Ravi, but others, made good their escape to a position of great natural strength which was also strongly fortified; here they were attacked by Peithon, who carried the fortress by assault and made slaves of all who had fled to it for refuge. The next place to be attacked was a city of the Brahmins to which the Malavas had flocked; here the resistance was desperate and most of the five thousand defenders sold their lives dear, only a few being taken prisoners.
After a day’s rest for the army, Alexander resumed the pursuit and, when he found the cities empty, he had the jungles scoured for fugitives, and his soldiers had instructions to kill everyone that was caught, unless he surrendered voluntarily....The Malavas now withdrew into the nearest stronghold, being hotly pursued by the enemy. In the assaults that followed the next day, the main walls of the city were yielded with little resistance; the citadel held out, and in the assault on it Alexander exposed himself in a way that nearly cost him his life; scaling ladders were few, and Alexander got up one of them, being the first to appear on the wall, a conspicuous target because of his shining arms; to escape the danger, he jumped within the citadel and only a few of his companions could join him there at once; they maintained an unequal contest for some time, but the arrows of the Malavas killed some of them, and Alexander himself was deeply wounded in the chest, and fainted with loss of blood when the arrowhead was pulled out by Perdiccas. Possibly Alexander adopted the desperate expedient to keep up the morale of his troops in this difficult war.
The danger to their king maddened the Greek troops and when they managed to gain the citadel by scrambling up the earthen walls and breaking In the gates, they did not spare man, woman or child....What was left of the Malava people after the decimation of the war sent in their submission now, and the Kshudrakas, who had been holding aloof so long as the swiftness of Alexander’s movements left them no chance of going to aid the Malavas, also sent their representatives with full authority to conclude a treaty with the invader....
But the campaign against the Malavas was no unalloyed success. As a record of mere slaughter it stands out unique even in the blood-stained annals of Alexander’s Indian campaigns...The progress of the flotilla down the Chenab and the Indus cannot be traced...More ships were built, and more tribes submitted along the course, the Abastanoi, (Ambashthas), Xathaoi (Kshaitiyas) and Ossadioi (Vasatis)....
The country below the last confluence differed from the Punjab in its political and social conditions, which have been noted with surprise by the Greek writers. There were no free tribes here, but principalities ruled by kings whose Brahmin counsellors had great influence with them and the people....
The greatest king of this region was known to the Greeks by the name Musicanus (Muchukarna ?). He did not offer his submission or even send presents, but when surprised by the sudden arrival of Alexander in his country, he adopted the course of prudence, tendered his submission and was confirmed in his territory though a garrison was installed in the citadel of his capital (Alor?), which Craterus was to fortify adequately. Alexander then took a number of cities with much booty, all from a chieftain named Oxycanus who was made prisoner. Sambus had abandoned his capital Sindimana when he heard that Alexander had made friends with his arch-enemy Musicanus; his relatives explained the situation to Alexander and offered presents, which were accepted.
But the most irreconcilable enemies of the foreigners in this region were the Brahmins (Brahmanako nama Janapadah-Patanjali) and one of their cities was carried by storm and all its inhabitants put to death. Meanwhile Musicanus, acting probably on the advice of his ministers, threw off his allegiance; Peithon who was sent against him suppressed the revolt with a strong hand. He destroyed some cities and placed garrisons in others; he took Musicanus captive and produced him before Alexander, who ordered that he should be executed along with his instigators.
Then came the ruler of Patala and the delta country and offered his submission...With the rest of the army Alexander continued his course downstream and reached Patala in the middle of July 325 B. C.; when he found the city deserted, he sent his emissaries to overtake the fugitives and persuade them to return in safety to their lands and cultivate them as formerly, and so most of the people did return to their homes....
Alexander set out with some ships to explore the western arm of the river; the task was rendered difficult by lack of knowledgeable pilots, the whole country having been deserted by its inhabitants....
When he reached the Arabios (Hab) he found the country deserted, as the Arabitai tribesmen had fled in terror. Crossing the river, he entered Las Bela, the land of the Oreitai, who offered a slight and ineffectual opposition to his progress. One of their villages, Rambakia, pleased Alexander by its situation and Hephaestion was instructed to colonise it with Arachosians (Curtius). When he passed on to the country of the Gedrosi, he appointed Apollophanes satrap over the Oreitai and leit Lenonnatus to reduce the country and help in the scheme of colonisation. Leonnatus fought a pitched battle with the tribesmen, inflicting great losses on them, and the satrap designate, Apollophanes, was among those who fell on his side.
-- Chapter II: Alexander's Campaigns in India, Excerpt from "Age of the Nandas and Mauryas", by K.A. Nilakanta Sastri