
Muhammad bin Qasim Al-Thaqafi (Arabic: محمد بن قاسم) (c. 31 December 695–18 July 715)Muhammad bin Qasim bin Yusuf Althaqafi was born in the city of Taif (a city in modern day Saudi Arabia) he belonged to the Thaqeef tribe which still settled in and around the city of Taif Saudi Arabia to this very day . He is the Arab Muslim general who conquered the Sindh and Punjab regions along the Indus river (now a part of Pakistan). The conquest of Sindh and Punjab began the Islamic era in South Asia and continues to lend the Sindh province of Pakistan the name Bab-e-Islam (The Gateway of Islam)
Muhammad bin Qasim was orphaned as a child and thus the responsibility of his upbringing fell upon his mother. She supervised his religious instruction herself, and hired different teachers for his worldly education. It was the uncle, Hajjaj bin Yousaf, who taught him the art of governing and warfare. Qasim was an intelligent and cultured young man who at the age of fifteen was considered by many to be one of his uncle's greatest assets. As a show of faith in his nephew's abilities, Hajjaj married his daughter to Qasim. At the age of sixteen, he was asked to serve under the great general, Qutayba bin Muslim. Under his command Muhammad bin Qasim displayed a talent for skilful fighting and military planning. Hajjaj's complete trust in Qasim's abilities as a general became even more apparent when he appointed the young man as the commander of the all-important invasion on Sindh, when he was only seventeen years old. Muhammad bin Qasim proved Hajjaj right when he, without many problems, managed to win all his military campaigns. He used both his mind and military skills in capturing places like Daibul, Raor, Uch and Multan. History does not boast of many other commanders who managed such a great victory at such a young age.
When Muhammad bin Qasim invaded Sindh, Hajjaj arranged for special messengers between Basra and Sindh, and told the general never to take any step without his advice. This order was followed to the letter during the campaign. “When you advance in the battle, see that you have the sun behind your backs,” Hajjaj wrote to his cousin just before the famous storming of Debal. “If the sun is at your back then its glare will not prevent you from having a full view of the enemy. Engage in fight immediately, and ask for the help of God. If anyone of the people of Sindh ask for mercy and protection, do give it to them. but not the people of Debal”
Hajjaj had put more care and planning into this campaign than the first campaign under Badil bin Tuhfa.Hajjaj superintended this campaign from Kufa by maintaining close contact with Muhammad bin Qasim in the form of regular reports and then regularly issuing orders. The army which departed from Shiraz in 710 CE under Muhammad bin Qasim was 6,000 Syrian cavalry and detachments of mawali from Iraq. At the borders of Sindh he was joined by an advance guard and six thousand camel riders and later reinforcements from the governor of Makran transferred directly to Debal by sea along with five catapults. The army that eventually captured Sindh would later be swelled by the Jats and Mids as well as other irregulars that heard of successes in Sindh. When Muhammad bin Qasim passed through Makran while raising forces, he had to re-subdue the restive Umayyad towns of Fannazbur and Arman Belah (Lasbela)[6] The first town assaulted was Debal and upon the orders of Al-Hajjaj, he exacted a bloody retribution on Debal by giving no quarter to its residents or priests and destroying its great temple in the process of freeing the kidnapped women.He then settled a garrison of four thousand colonists in one quarter Debal and built a mosque over the remains of the original temple.
The fate of Debal sent shockwaves across Sindh. People consulted their astrologers, and soon the word was out: fate has ordained the country to fall to the Arabs. It is more likely than not that the Arab invaders sponsored the rumour after seeing at Debal how local superstition could be exploited as a war strategy. The Buddhist population of Sindh was the first to make secret alliances with the Arabs, since they had little stake in the rule of the Brahmin dynasty. Hajjaj Bin Yousuf carefully dictated the Arab terms of mercy to Muhammad bin Qasim all the way from Basra. “Whoever submits to you, let him retain his power and wealth and family,” Hajjaj ordered his cousin. “And whoever does not submit, treat him brutally and torture him till he submits.”
