The conquest of Sindh wasn't a series of battles between armies; it was a sustained campaign of sieges against fortified native cities. The standard operating procedure upon breaching city walls, as documented in the Chachnama and Al-Baladhuri's Futuh al-Buldan, involved mass execution of combatants, slavery for dependents, and absolute extraction of wealth.

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The Siege of Debal (711 CE)

The port city of Debal was the first major target. Muhammad bin Qasim's forces arrived by land and sea, bringing a massive catapult known as Urus ("The Bride"), which required 500 men to operate.

The city's defense was centered around a magnificent Hindu/Buddhist temple topped with a giant red flag. Qasim targeted the flag, and its destruction demoralized the defenders. Once the walls were breached by the siege engines, the real horror began.

The Three-Day Massacre: Upon entering the city, Qasim executed the direct orders of Hajjaj bin Yusuf. For three days, a general massacre was conducted. All males deemed capable of bearing arms (17 years and older) were killed. The temple was desecrated, the priests executed, and the surviving women and children were taken as slaves. The immense plunder was divided: one-fifth (the khums) was sent to Hajjaj and the Caliph in Damascus, alongside tens of thousands of slaves, while the rest was distributed among the soldiers.
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The Battle of Rawar (712 CE)

The decisive battle of the conquest took place near Aror. Raja Dahir, the Brahmin king of Sindh, assembled his forces to stop the Umayyad advance. The battle was fierce, and the native army fought with desperate bravery against the veteran Arab cavalry.

Dahir led his troops from atop his war elephant. When a naphtha arrow fired by the Arab forces struck Dahir's elephant, the beast panicked and plunged into the river. Though Dahir managed to remount and fight on horseback, he was isolated, surrounded, and slain.

The Jauhar of Rani Ladi: Dahir's head was severed to be sent as a trophy to Iraq. The remaining forces retreated to the fort of Rawar, commanded by Dahir’s queen, Rani Ladi (or Bai). Recognizing that defeat was inevitable and knowing the horrific fate of enslavement and rape that awaited them, the Queen and the women of the royal household committed Jauhar—mass self-immolation in a massive pyre—preferring death over dishonor.
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The Slaughter at Brahmanabad

Following Dahir's death, the resistance was sustained by his son, Jai Singh, at Brahmanabad. The siege dragged on for months, exhausting both sides until a betrayal from within forced the city’s surrender.

Despite promises of quarter given by some commanders, Qasim adhered to the doctrine of absolute subjugation. The surviving defenders faced merciless retaliation.

Decimation of the Defenders: The Chachnama explicitly records the toll of Brahmanabad. Between 6,000 and 16,000 fighting men were systematically executed in the aftermath of the siege. Their dependents were enslaved. It was here that two daughters of Raja Dahir, Surya Devi and Parimala Devi, were captured and sent as slaves to the Caliph's harem—an event that would ultimately seal Qasim's own fate.
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Multan: The City of Gold (713 CE)

Pushing northward into the Punjab region, Qasim reached the strongly fortified city of Multan. The city held out for two months until an informant revealed the source of the city's water supply. Qasim cut off the water canal, forcing the garrison to surrender.

Multan was famous throughout the subcontinent for its magnificent Sun Temple, which housed unimaginable wealth donated by pilgrims over centuries.

The Ultimate Plunder: The wealth looted from the Sun Temple of Multan was so staggering that the Arabs renamed it Faraj Bayt al-Dhahab (The Frontier House of Gold). Mountains of gold, silver, and precious gems were extracted. A massive idol made of pure gold with ruby eyes was desecrated. A piece of cow's flesh was tied to the idol's neck to humiliate the native worshippers before the wealth was shipped back to Damascus.
"When the army reached Brahmanabad, Muhammad Qasim ordered all the men of military age to be put to the sword... The artisans, merchants, and common people were left alone but subjected to heavy taxation (Jizya). The plunder and captives were enormous." — From the historical chronicles summarizing the Chachnama narratives.
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Religious Persecution →

Understanding the institutionalized demographic destruction through mass enslavement and Jizya.