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The conquest of Sindh by Muhammad ibn al-Qasim al-Thaqafi between 93 and 96 AH (711–715 CE) brought the Indian subcontinent within the Islamic sphere for the first time. It was a campaign of remarkable military efficiency led by a young commander who combined strategic boldness with administrative skill, and it established a Muslim presence on the subcontinent that would eventually transform South Asia.
Sindh — the region comprising the lower Indus Valley, roughly corresponding to present-day southern Pakistan — was in the early 8th century ruled by the Hindu raja Dahir ibn Chach. The region had long been a source of frustration for the Umayyad governors of the eastern provinces.
The immediate pretext for the campaign was the piracy problem. Ships carrying Muslim merchants and, according to some accounts, women returning from Sri Lanka to Hajjaj's territories were attacked by pirates operating from the Sindhi port of Debal (near modern Karachi). When Dahir refused to suppress the pirates or provide compensation, al-Hajjaj ibn Yusuf, governor of Iraq and the east, sought permission from Caliph al-Walid ibn Abd al-Malik to launch a punitive campaign.
Al-Hajjaj had already sent two earlier expeditions that were defeated by Dahir's forces. He chose his young kinsman Muhammad ibn al-Qasim, reportedly only seventeen years old at the time of his appointment (or possibly in his early twenties — sources differ), to lead the third and decisive campaign.
Muhammad ibn al-Qasim assembled a well-equipped force in Shiraz that has been estimated at six thousand regular cavalry with significant infantry and artillery support, including catapults. He received detailed intelligence about Sindhi geography and military capabilities from al-Hajjaj's extensive information network.
He advanced through Makran (the coastal desert region of present-day Baluchistan) along a route that had been partially prepared in advance with supply depots and water points — a logistical achievement in extremely difficult terrain. The march itself was a test of planning and endurance.
The first major objective was Debal, the principal port city of Sindh. Muhammad ibn al-Qasim besieged the city and, after positioning his heavy catapults, brought down the high temple tower that served as the city's landmark. The fall of this tower, according to the Arabic sources, was a decisive psychological blow to the defenders as well as a practical military achievement.
Debal fell after the siege, and Muhammad ibn al-Qasim treated the population according to his standing orders: non-combatants who surrendered received protection; those who resisted faced the consequences of war. He established a mosque in the city and appointed an administrator before advancing.
The decisive confrontation with Dahir came at Rawar on the eastern bank of the Indus in 93 AH. Muhammad ibn al-Qasim needed to cross the Indus with his army against an opposing force on the far bank — a classic tactical problem requiring speed, deception, and coordination.
He executed the crossing using boats acquired in the region and launched his attack when Dahir's attention was divided. The battle was hard-fought. Dahir, a warrior king who personally led his forces riding an elephant, was killed during the engagement. The death of the king effectively ended organized resistance, as the Sindhi forces had no second line of command capable of rallying the army.
Dahir's wife reportedly continued resistance from the fortress of Rawar but eventually surrendered. Other Sindhi nobles offered submission in exchange for security guarantees, which Muhammad ibn al-Qasim generally honored.
After Rawar, Muhammad ibn al-Qasim advanced systematically through Sindh. He took Brahmanabad (the main city of lower Sindh), Alor (Dahir's former capital), and Multan (the major city of upper Sindh). Each city either capitulated on terms or was taken by assault after brief sieges.
Multan, one of the wealthiest cities in the region, was particularly significant. Its famous sun temple held enormous wealth, which Muhammad ibn al-Qasim took as war spoils while allowing the temple's priests to continue their religious practices under Muslim protection — a policy consistent with the dhimmi framework the early Muslim conquerors applied to non-Muslim religious communities.
The administrative policy Muhammad ibn al-Qasim implemented in Sindh has been a subject of scholarly attention. His standing orders from al-Hajjaj, reportedly preserved in the Chachnama (an Arabic administrative history of Sindh later translated into Persian), granted the Hindus and Buddhists of Sindh the same dhimmi status that Jews and Christians held in other parts of the caliphate: freedom to practice their religion, protection of their temples and institutions, in exchange for the payment of jizya (the non-Muslim poll tax).
This policy was pragmatic and consistent with Islamic jurisprudential tradition regarding peoples of protected status. It also reflected the reality that a small Muslim military force governing a vast and predominantly non-Muslim population had to rely on local administrative structures and the cooperation of existing elites.
Hindu and Buddhist religious institutions continued to function. Local administrative personnel — accountants, scribes, and revenue officials who understood the local agrarian economy — were retained in their positions. Muhammad ibn al-Qasim appears to have understood that conquest required both military success and sustainable governance.
Muhammad ibn al-Qasim's campaign was interrupted by political events at the caliphal court. When Caliph al-Walid ibn Abd al-Malik died in 96 AH and was succeeded by his brother Suleiman ibn Abd al-Malik — who was hostile to al-Hajjaj and his associates — Muhammad ibn al-Qasim was recalled and executed. He was reportedly tortured to death on the orders of Suleiman, dying in his mid-twenties.
The nature of his death, coming so soon after his greatest achievements, was considered a grave injustice by contemporaries and later historians. Ibn Khaldun noted the cruelty of his fate. His recall left the conquest of Sindh incomplete: further advances into India that he had begun did not continue, and the Muslim hold on Sindh remained limited to the lower Indus Valley.
Despite the premature end of Muhammad ibn al-Qasim's career, his conquests had profound long-term significance. The Muslim presence in Sindh established the beginning of Islam's engagement with the Indian subcontinent — an engagement that would eventually make South Asia the home of the world's largest Muslim population.
The trade routes through Sindh connected the Islamic world with the Indian Ocean commercial network. The exchange of ideas between Muslim scholars and Indian scholars — including the translation of Indian mathematics and astronomy into Arabic — was facilitated by this connection. The decimal numeral system that the Islamic world transmitted to Europe was first encountered through contacts initiated by the Sindh conquest.
For the Prophetic era, see the Seerah timeline.