Sher Shah Suri (Farid al-Din Khan; 1472 or 1486 – 22 May 1545), also known by his title Sultan Adil (lit. 'the Just King'), was the ruler of Bihar from 1530 to 1540, and Sultan of Hindustan from 1540 until his death in 1545. He defeated the Mughal Empire, founding the Sur Empire and establishing his rule in Delhi. The influence of his innovations and reforms extended far beyond his brief reign. During his time in power, he remained undefeated in battle and was renowned as one of the most skillful Afghan generals in history. By the end of his reign, his empire covered nearly the entirety of Northern India.

Born between 1472 and 1486 and given the name Farid Khan, his early childhood saw him flee from home due to internal family strife. He pursued an education in Jaunpur, where his rise to power began after his father offered him a managerial position over his jagirs. Sher Shah effectively governed these territories, gaining a reputation for his reforms that brought prosperity to the region. However, due to family intrigues, he eventually relinquished his position over the jagirs. Sher Shah then moved to Agra, where he stayed until his father's death. This event allowed him to return to his family's jagirs and take control, thereby solidifying his leadership and furthering his rise to power.

Sher Shah spent time in Agra after the Mughals gained power, observing the leadership of Babur. After leaving Agra, he entered the service of the governor of Bihar. Following the governor's death in 1528, Sher Shah obtained a high position in Bihar and, by 1530, became the regent and de facto ruler of the kingdom. He engaged in conflicts with the local nobility and the Sultanate of Bengal. In 1538, while Mughal Emperor Humayun was engaged in military campaigns elsewhere, Sher Shah overran the Bengal Sultanate and established the Suri dynasty. He defeated the Mughals and drove them out of India, establishing himself as emperor in Delhi. Sher Shah led numerous military campaigns against his neighbors, conquering Punjab, Malwa, Marwar, Mewar, and Bundelkhand. A brilliant strategist, Sher Shah was both a gifted administrator and a capable general. His reorganization of the empire and strategic innovations laid the foundations for future Mughal emperors, notably Akbar. Sher Shah died in May 1545 while besieging Kalinjar fort. Following his death, the empire descended into civil war until it was eventually re-conquered by the Mughals.

During his rule as Emperor of the Sur Empire, Sher Shah implemented numerous economic, administrative, and military reforms. He issued the first Rupiya organized the postal system of the Indian subcontinent, as well as extending the Grand Trunk Road from Chittagong in Bengal to Kabul in Afghanistan, significantly improving trade. Sher Shah further developed Humayun's Dina-panah city, renaming it Shergarh, and revived the historical city of Pataliputra, which had been in decline since the 7th century CE, as Patna. Additionally, he embarked on several military campaigns that restored Afghan prominence in India.

His birth name was Farid Khan. After 1526, he was conferred the title Sher Khan, and following his ascension as Sultan of Hindustan in 1540, he became known as Sher Shah.

His surname 'Suri' was taken from his Pashtun Sur tribe. He was a distant kinsman to Babur's brother-in-law, Mir Shah Jamal, who remained loyal to Humayun. The name Sher (means lion or tiger in the older pronunciation of Persian) was conferred upon him for his courage, when as a young man, he killed a tiger that leapt suddenly upon the governor of Bihar, Behar Khan Lohani.

Sher Shah was born in Sasaram, located in present-day Bihar, India. His birth date is disputed, with some accounts stating he was born in 1472, while others claim 1486. He was of Pashtun Afghan origin, belonging to the Sur clan.

Sher Shah's grandfather, Ibrahim Khan Sur, began his career as a horse trader and eventually became a landlord (Jagirdar) in the Narnaul area of present-day Haryana. He represented his patron Jamal Khan Lodi Sarangkhani, who assigned him several villages in Hissar Firoza. Sher Shah's father, Hasan Khan Sur, entered the service of Jamal Khan. In 1494, Jamal Khan was promoted and established in Bihar by Sikandar Khan Lodi. At Jamal Khan's request, Sikandar granted Hasan the jagirs of Khwaspur, Sasaram, and Hajipur in Bihar.

Hasan had several wives and fathered over eight sons, with Nizam Khan being Sher Shah's only full brother. One of Sher Shah's stepmothers was cruel to him, and Hasan, being too submissive to his wife, was unable to intervene. As a result, Sher Shah sought refuge with Jamal Khan, aiming to gain experience and further his education.

Sher Shah pursued his education in Jaunpur for several years, studying subjects such as history and religion. On one occasion, Hasan visited Jamal Khan in Jaunpur and encountered some of Sher Shah's relatives, who spoke of Sher Shah's potential for future greatness. Impressed by these accounts, Hasan invited Sher Shah to manage his domains in 1497.

Sher Shah accepted his father's offer and embarked on implementing numerous reforms. His early administrative career focused on combating corruption. One of Sher Shah's significant reforms as administrator of his father's domains was the assessment of land revenues, along with defining and establishing commissions for tax collectors. However, despite these reforms, Sher Shah faced resentment and intrigue from his stepmother, who had initially forced him to flee, and his step-brothers. This opposition eventually led to Sher Shah resigning from his post in 1518, after serving as manager for 21 years. Following his resignation, he initially engaged in banditry before departing for Agra, which was under the rule of the Lodi dynasty of the Delhi Sultanate.

Sher Shah remained in Agra until his father's death, after which he received his father's jagirs from Sultan Ibrahim Khan Lodi. Returning to his jagirs in 1520—21, Sher Shah began administering them while in the service of Behar Khan Lohani. Conflict emerged however over the split of his father's land between his brothers, and Muhammad Khan Sur initially drove Sher Shah from the estate by defeating one of his governors. In 1526, the Lodis were overthrown, bringing the Mughals to power under Babur. During this time, Behar Khan Lohani established an independent state in Bihar and assumed the title of Sultan Muhammad. With the aid of Junaid Khan, the Mughal governor of Jaunpur, Sher Shah joined Mughal service. In April 1527, after Babur launched a campaign against the Afghans in Bihar, Sher Shah distinguished himself, and his estates were restored in 1528. With his jagirs secured, Sher Shah accompanied Junaid Khan to Agra where he met Mughal emperor Babur. During this time, Sher Shah was conferred the title of Sher Khan after killing a tiger that leapt upon the ruler of Bihar. Sher Shah remained in Agra, observing Mughal military organization and administration.

During one occasion while dining with Mughal Emperor Babur, Sher Shah encountered a dish he was unfamiliar with eating customarily. In response, he drew his dagger cut the dish into smaller pieces, and then ate it with a spoon. Babur took notice and informed his minister Mir Khalifa:

Keep an eye on Sher Khan, he is a clever man and the marks of royalty are visible on his forehead. I have seen many Afghan nobles, greater men than he, but they never made an impression on me, but as soon as I saw this man, it entered into my mind that he ought to be arrested for I find in him the qualities of greatness and the marks of mightiness.

— Babur

Suspecting a rising plot against him, Sher Shah departed Agra and left Mughal service, returning to his Jagirs in 1528. He sought refuge under the protection of Sultan Muhammad of Bihar. Upon Sher Shah's arrival, he was warmly received and appointed as the guardian of Muhammad's son, Jalal Khan.

In October 1528, Sultan Mohammad of Bihar died, and his queen, Dudu Bibi, assumed the role of regent. Sher Shah was appointed as her deputy governor, allowing him to begin consolidating his position in the region through a myriad of military and administrative reforms. These reforms significantly strengthened his position, making him one of the most influential Afghan leaders in India.

In 1529, Sher Shah anticipated joining Mahmud Lodi, the younger brother of Ibrahim Lodi in his insurrection against the Mughals that rallied most of the significant Afghan leaders in India. Sher Shah however, recognized the division among the Afghans and Mahmud's incompetence, thus refusing to aid Mahmud. Intending for the unification of all Afghan leaders, Mahmud marched with his army to Sasaram, persuading Sher Shah to join the rebellion. Hesitatingly, Sher Shah accompanied the expedition with his own set of men, and the insurrection initially succeeded, capturing Ghazipur and Banaras. However, upon the arrival of Mughal forces, Mahmud Lodi abandoned the army. After this, many Afghan nobles including Sher Shah submitted to Babur. In early 1530, the death of Dudu Bibi enabled Sher Shah to become the regent for Jalal Khan, effectively making him the de facto ruler of Bihar.

Despite his growing power, many of the Lohani nobles opposed Sher Shah's dominance. Although he offered to share power, the Lohani nobles rejected his proposal and instead fled to Bengal with Jalal Khan, seeking the support of Nasiruddin Nasrat Shah, the ruler of the Bengal Sultanate. Consequently, Sher Shah became the sole ruler of Bihar. However, he did not adopt any grand titles, preferring to style himself as Hazrat-i-Ala.

Taj Khan, the governor of Chunar, was assassinated by his stepson. In the aftermath, his wealthy widow, Lad Malika, sought a protector to secure her position. Recognizing Sher Shah's growing influence, she agreed to marry him. Through these negotiations, which were kept secret from Taj Khan's sons, Sher Shah gained control of Chunar. This acquisition significantly bolstered Sher Shah's power and influence in the region, as he now controlled a significant fort and a large treasury.

The death of Mughal Emperor Babur in December 1530 saw the Afghan insurrection cause rejuvenated, and Mahmud Lodi again returned. Sher Shah immediately ignored Mahmud's attempts of garnering Sher Shah's aid until he was promised all of Southern Bihar. After further being visited by Mahmud, Sher Shah acquiesced. The combined Afghan forces marched on Banaras and Jaunpur, with Junaid Khan withdrawing to Agra. The Afghan forces followed up their victories by seizing Lucknow.

Humayun, entrenched in a siege of Kalinjar, immediately withdrew, crossing the Ganges and began a battle against Mahmud Lodi at Dadrah in 1531. The Afghan forces were decisively defeated, and the coalition was shattered. Mahmud Lodi fled to Orrisa, while Sher Shah emerged on top by keeping Southern Bihar.

Humayun followed up his victory by besieging Chunar, a fortress owned by Sher Shah, in September 1532. The siege continued for over four months to no avail. In order to make peace, Sher Shah offered his loyalty to the Mughals on the condition that he remained in control of Chunar, offering to send his third son, Qutb Khan, as hostage. Humayun accepted and lifted the siege in December 1532, returning to Agra due to the rising threat of Bahadur Shah, the ruler of the Gujarat Sultanate. Humayun did not wish to split up his forces under the command of a noble to continue the siege, as this would split his strength, additionally giving reason for peace to be established.

Makhdum Alam, the administrator of Hajipur, refused to recognize Ghiyasuddin Mahmud Shah as the Sultan of Bengal accusing him of assassinating Sultan Alauddin Firuz. He formed an alliance with Sher Shah, who saw this as an opportunity to crush the power of the Lohani nobles allied with Mahmud Shah. Mahmud Shah sent several expeditions against Sher Shah, which were all defeated. Makhdum Alam however, was killed and his estates fell to Sher Shah upon his death. In 1534, Mahmud Shah sent an army of artillery, cavalry and infantry under Ibrahim Khan to conquer Bihar, with Jalal Khan accompanying the campaign. However, Sher Shah launched a sudden attack on the combined forces of the Lohani chiefs of Bihar and Mahmud Shah of Bengal, defeating them at Surajgarh in March 1534, winning a decisive victory. Ibrahim Khan was killed admist the battle, and Jalal Khan was forced to retreat to Bengal. Following the victory, Sher Shah consolidated his control over Bihar.

Between 1536 to 1537, Sher Shah followed up his victories by invading Bengal and defeating Mahmud Shah numerous times, occupying all lands west of the Teliagarhi pass. Mahmud Shah repeatedly requested the Portuguese to aid him, which they did by fortifying the Teliaghari and Sakrigali passes. Sher Shah, however, out-flanked the combined armies and reached Gauda by way of Jharkhand. Mahmud Shah immediately capitulated, and was forced to pay over 13,000,000 gold coins, and cede territory up to Sakrigali.

Eager to conquer the Bengal Sultanate, Sher Shah prepared for another invasion of the Bengal Sultanate. An opportunity came when Mahmud Shah failed to send annual tribute, forcing Mahmud Shah to seek refuge in Gaur and frantically ask Humayun for aid. In response, Humayun mobilized a Mughal army in July 1537, and advanced towards Chunar. He reached the fort in November 1537 and laid siege to it. The siege would last over six months before the fort finally fell. Following this, Sher Shah began a second invasion into Bengal, seizing Rohtasgarh in March 1538 through stratagem. He used Rohtasgarh to situate Afghan families and loot he obtained during the war. Following up his victory, Sher Shah besieged Gauda, which fell in April 1538. Split detachments would also be sent to conquer Chittagong. Another force battled against Mahmud Shah led by Khawas Khan Marwat, a general of Sher Shah, which saw Mahmud Shah decisively defeated and mortally wounded. With these victories, Sher Shah held his first coronation.

After the fall of Gauda, Sher Shah offered favorable peace terms to Humayun, proposing to pay 10,000,000 dinars, and the cessation of Bihar in exchange for control of Bengal. Humayun refused the offer, not wishing to leave the Bengal's rich resources to a hostile state. Additionally, the wounded Mahmud Shah, who had entered Humayun's camp, urged him to continue the war against Sher Shah. Mahmud Shah died from his wounds soon after.

Following this, Humayun marched towards Bengal to confront Sher Shah. However, the Mughal army was overwhelmed by poor weather conditions, with heavy rains causing the loss of their baggage between Patna and Monghyr. Humayun eventually reached Gauda and seized it without opposition on 8 September 1538. However, the city had been abandoned by the Afghans, who had stripped the treasury of any loot. Humayun remained in Gauda for months, restoring order to the city despite being stuck there due to the weather. Meanwhile, Sher Shah advanced into Humayun's territory, seizing Bihar and Varanasi, reclaiming control over Chunar, and laying siege to Jaunpur. Other detachments of the Afghan army extended as far as Kannauj. As a result, Humayun found himself effectively stranded in Gauda with no lines of communication. Upon learning of disturbances in Agra, Humayun immediately sought to settle for peace with Sher Shah. However, as he crossed the Karmanasa River, where his army was vulnerable to attack, Sher Shah capitalized on the Mughal army's fragile state and attacked at the Battle of Chausa. The Afghans descended on the Mughal army, which was 200,000 strong. Overwhelmed, the Mughal army was completely routed, and ultimately annihilated. Humayun barely escaped with his life, with the Mughals suffering over 7,000 casualties, including many prominent noblemen.

Following his defeat, Humayun returned to Agra, and restored order after disturbances caused by his brother, Hindal Mirza. He then mobilized a colossal army, and advanced against Sher Shah, who amassed his own army, although being numerically inferior. The two armies met at Kannuaj, mirroring each other across the Ganges river. Humayun crossed the river and engaged in skirmishes with Sher Shah's forces. During the fighting, many of Humayun's nobles hid their insignia to avoid recognition by the Afghans, and several fled the battle. The Mughal army was ultimately defeated, forcing Humayun to flee. Following this victory, Sher Shah was crowned a second time on 17 May 1540, being declared the ruler of Hindustan and adopting the epithet Sultan Adil, meaning "Just King." He further took on the name Sher Shah.

As Humayun fled, Sher Shah pursued him with split detachments. He then seized Agra, defeating the Mughals there and sent Khawas in pursuit of Humayun. The pursuit and flight of Humayun allowed Sher Shah to capture and enter Delhi, beginning the consolidation of his rule there by reorganizing its administration. As Humayun reached Lahore in July 1540, the Afghans were at Sultanpur Lodhi. With the approach of the Afghans, the Mughals fled Lahore. At Khushab, Humayun and Kamran quarreled and parted ways, with Humayun leaving for Sindh, and Kamran to Kabul.

As Humayun began withdrawing, Khawas Khan initially gave up the pursuit, halting on the Jhelum river. Sher Shah then advanced from Sirhind toward Lahore, and then continued toward the Chenab river before arriving at Khushab. At Khushab, Sher Shah sent two detachments under Khawas Khan and Qutb Khan to pursue Humayun and his contingent out of the region. The pursuit as far as the Panjnad River, before withdrawing back to Khushab and merging with Sher Shah's force.

Remaining encamped at Khushab, Sher Shah received the submission of Baloch chiefs including prominently Ismail Khan, Fateh Khan, Ghazi Khan, and many others who ruled the region between the Chenab and the Indus rivers. Sher Shah then entered into conflict with the Gakhars, who had historically been difficult to subjugate despite attempts by previous rulers. Sher Shah initially attempted diplomacy, inviting the Gakhar chief to acknowledge him as the emperor of India. However, the Gakhar gave an insulting response which enraged Sher Shah. In retaliation, Sher Shah marched through Punjab, subjugating the Gakhars, devastating much of the countryside, and taking many prisoners. To further secure his rule, Sher Shah established Rohtas Fort and stationed 50,000 men in Punjab under his generals Haibat Khan Niazi and Khawas Khan Marwat. Subsequently, Sher Shah turned his attention to Bengal, where the governor he had appointed had become rebellious.

Recognizing the importance of Bengal, Sher Shah focused much of his administrative efforts in the region. In March 1541, Khijir Khan, the governor of Bengal under Sher Shah, led a revolt, as well as marrying a daughter of the former Sultan, Mahmud Shah. Sher Shah mobilized an army and personally led it to defeat Khijir Khan, restoring Bengal to his suzerainty. He then divided Bengal into 47 smaller administrative divisions, each overseen by a shiqdar, with Kazi Fajilot established as the chief supervisor of the Muqtars. These reforms increased the prominence of Afghans in Bengal, leading many to settle in the region. Some of these Afghan settlers later established the Muhammad Shahi dynasty, which ruled Bengal from 1553 to 1563, and the Karrani dynasty, which ruled from 1563 to 1576.

In 1542, Sher Shah embarked on a campaign to Malwa. Qadir Khan, the ruler of the Malwa Sultanate, had offended Sher Shah by claiming he was equal to him, as well as failing pledged aid against the Mughals. Upon arriving in Gwalior, the governor of the city submitted to the Afghans. The Afghan army continued their march to Sarangpur. Believing defeat was imminent, Qadir Khan left Ujjain and awaited at Sarangpur for Sher Shah's arrival. Sher Shah received him, they together advanced into Ujjain. Sher Shah then made Qadir Khan the governor of Gauda. However, suspicious of Sher Shah's intentions, Qadir Khan fled to Gujarat, leaving Malwa annexed to Sher Shah's domain.

Sher Shah consolidated his new territories before returning to Agra, also receiving submission from the ruler of Ranthambore. Shujaat Khan was appointed as the new governor of Malwa, with further attempts from Qadir Khan to reclaim Malwa ending in failure against Shujaat Khan.

After the death of Bahadur Shah of Gujarat, Puran Mal regained control of Raisen, which had been annexed by Bahadur Shah in 1532. Following the re-capture of the city, Puran Mal was accused of committing tyrannies unto the Muslim populace, which Puran Mal denied. After assembling an army, the Rajputs, facing defeat, surrendered under the promise of safe conduct. Puran Mal withdrew from the fort with 4,000 Rajputs, including their families. However, after being ill-advised by fanatic Muslims, as well as Muslim widows appealing to him after allegedly suffering under Puran Mal's rule, Sher Shah gave permission for the Afghan army to attack the Rajputs while they were still leaving the fort. The Rajputs killed their women and children before engaging in battle with the Afghans, before being defeated as the Afghans massacred them. This act is considered the darkest mark on Sher Shah's reign.

Having initially attempted to aid Humayun in regaining his throne, as well as having failed to capture Humayun for Sher Shah, and Marwar itself being a formidable kingdom and threat to his rule, Sher Shah began preparing for war in August 1542.

In early 1543, Sher Shah Suri, with a force of 80,000 cavalry, set out against Maldeo Rathore, the Rajput king of Marwar. The Afghan army advanced through Merta before Maldeo advanced with his own army of 50,000 to face Sher Shah, which had halted in the village of Sammel in the pargana of Jaitaran, near Jodhpur. Establishing defenses, Sher Shah's strong position made it difficult for Maldeo to launch an attack, while Sher Shah's position became dangerous due to supply difficulties for his large army. Sher Shah thus resorted to intrigue by dropping forged letters near Maldeo's camp, falsely indicating that some of his commanders intended to defect to the Afghans. This caused great distress to Maldeo, leading him to abandon his commanders and retreat to Jodhpur with his men.

Maldeo's generals, Jaita and Kumpa, split off a contingent of 12,000 men to fight against the Afghans. In the resulting Battle of Sammel, Sher Shah emerged victorious. Following the victory, Khawas Khan Marwat took possession of Jodhpur and occupied the territory of Marwar from Ajmer to Mount Abu in 1544, with Bikaner also submitting to Afghan rule.

Following the conquest of Marwar, Sher Shah besieged Kalinjar Fort in 1544. Due to continuous resistance from the Rajputs, he besieged the fort for seven months. The circumstances regarding Sher Shah's death are uncertain. Some sources state that he was mortally wounded by a gunpowder explosion when one of his cannons burst. Another account suggests that during a battle, as he descended from a rampart and ordered his men to hurl bombs into the fort, one bomb reflected back and hit a cache of bombs, causing a large explosion. Some people escaped with minor burns, while Sher Shah was found half-burned and taken to his tent, where he remained for two days. Despite his critical condition, he ordered his men to swarm the fort, advancing close to the fort with his troops. Upon hearing that the fort had finally fallen, he remarked, "Thanks to Almighty god." Sher Shah succumbed to his wounds and died on 22 May 1545, at the age of 73 or 59.

At the end of his reign, Sher Shah's empire spanned nearly the entirety of Northern India, excluding Assam, Kashmir, Gujarat, and the North-West Frontier Province. He was succeeded by his son, Jalal Khan, who took the name Islam Shah Suri. Sher Shah was buried in the tomb of Sher Shah Suri, which stands in the middle of an artificial lake at Sasaram, a town on the Grand Trunk Road. The tomb finished its construction on 16 August 1545, three months after his death.

Hermann Goetz posited that one of the motivations for Sher Shah choosing his birthplace, Sasaram, as the sight of his tomb, was that:

"For Sher Shah Sasaram was the very symbol of his life and glory".

Decades after his death, the Tarikh-i-Sher Shahi was commissioned by Akbar to detail the reign of Sher Shah. Written by Abbas Sarwani, the source was significant toward detailing the conquest of Bengal by Sher Shah as well as the magnitude of his reforms, and greatly benefited in contribution towards the history of medieval India.

The system of tri-metalism which came to characterize Mughal coinage was introduced by Sher Shah. While the term rūpya had previously been used as a generic term for any silver coin, during his rule the term rūpee came to be used as the name for a silver coin of a standard weight of 178 grains, which was the precursor of the modern rupee. The Rupee is today used as the national currency in India, Indonesia, Maldives, Mauritius, Nepal, Pakistan, Seychelles, and Sri Lanka. Gold coins called the Mohur weighing 169 grains and copper coins called Paisa were also minted during his reign. According to numismatists Goron and Goenka, it is clear from coins dated AH 945 (1538 AD) that Sher Shah had assumed the royal title of Farid al-Din Sher Shah and had coins struck in his own name prior to the battle of Chausa.

The Sur Empire was divided into many subdivisions called Iqtas, which were often ruled by military governors. Haibat Khan, who governed the Punjab, commanded over 30,000 men and could distribute jagirs to his soldiers. Khawas Khan, another military governor, ruled over Rajasthan with a force of over 20,000 men. The heads of Iqtas were known by various titles such as Hakim, Faujdar, or Momin and typically commanded bodies of men usually numbering less than 5,000. Their responsibilities included maintaining order and enforcing law within their jurisdictions.

Iqtas were further divided into districts known as Sarkars, each overseen by two chief officers: the Shiqar and the Munsif. The Shiqar was responsible for civil administration and could field 200-300 soldiers to maintain law and order. The Munsif handled revenue collection and civil justice, while chief Shiqars often dealt with criminal justice cases.

Sarkars were in turn divided into smaller units called Parganas. which consisted of a town and its surrounding villages. Each Pargana had a Shiqar, a Munsif, a Fotdar (treasurer), and a Karkun (clerk) proficient in Hindi and Persian. The Shiqar of a Pargana was a military officer under the Sarkar's Shiqar's oversight and was responsible for maintaining stability and assisting the Munsif in land revenue collection and measurement. The Munsif in the Pargana was under the supervision of the chief Munsif in the Sarkar.

Villages within the Parganas often operated autonomously and were governed by assemblies called Panchayats. This was respected by Sher Shah during his reign. These assemblies consisted of village elders who managed local needs and enforced community-specific punishments. The village chief acted as a liaison between the village and the higher levels of government.

The religious policy of Sher Shah is debated amongst historians. Dr. Qanungo states that Sher Shah upheld religious tolerance toward Hindus. Ram Sharma states that Sher Shah Suri was heavily devoted to his faith, always praying the five prayers, while also claiming that Sher Shah's wars against the Rajputs were a Jihad. The war against Puran Mal in particular was described as a Jihad, and his treatment of Maldeo were argued as signs of religious intolerance. However, Sher Shah was always tolerant of Hindus, and did not bear grudges against them, or wage Anti-Hindu propaganda.

According to Srivastava, Sher Shah's balanced approach satisfied his fellow Muslims despite his lenient treatment of Hindus. Sher Shah's policy was that Islam would hold supremacy over the lands he conquered, but without displacing Hinduism.

Sher Shah invited Afghans from across the empire as well as Afghanistan, giving them high positions and personally taking an interest in recruiting troops. Sher Shah promoted individuals based on merit rather than nepotism. The Afghan army emphasized cavalry, while their infantry were armed with muskets. One of his military reforms included dividing his army into divisions, each led by a commander. Discipline was strict, with provisions supplied by Banjaras who accompanied the army. Roles were assigned through the Dagh system, which also helped root out foreign spies.

During Sher Shah's first Bengal campaign from 1536 to 1537, his army was reportedly 240,000 strong, comprising 40,000 horsemen, 200,000 Infantry, 1,500 elephants, and 300 boats. In his second invasion from 1537 to 1538, his forces were said to include 100,000 horsemen, and 300,000 footmen. These figures are likely exaggerated. A distressed Mughal commander in 1535 reported that Sher Shah only had 6,000 horsemen, while merely a few years later, he had over 70,000. These figures are put into question by Kolff, but he emphasizes the capabilities of Sher Shah in his methods of recruitment.

Sher Shah considered Pashto as a sign of friendliness, and gave higher salaries to Afghans who could speak Pashto in his army. By 1540, his standing army consisted of over 150,000 cavalrymen, 25,000 infantrymen, and over 5,000 war elephants.

Sher Shah was renowned for his social justice. Courts were held by Qadis, with Sher Shah himself observing civil cases. Hindus settled their disputes in Panchayat assemblies, while in criminal cases, nobody was exempt from the law of the empire. The criminal law of the empire was extremely harsh to deter others from committing crimes out of fear of the repercussions. Sher Shah imposed heavy punishments on individuals in high posts, including government officials.

Sher Shah's reputation grew as he became known for being a formidable and just ruler, to the point where merchants could travel and sleep in deserts without fear of being harassed by bandits or robbers. His soldiers acted as police, with the duty of finding thieves and robbers. Sher Shah Suri also implemented the reform of self-responsibility, assigning officials the duty to find culprits in cases such as murder; if they failed, they would be held responsible and hanged. Historians praise these reforms for their effectiveness.

Sher Shah built several monuments including Rohtas Fort (now a UNESCO World Heritage Site in Pakistan), many structures in the Rohtasgarh Fort in Bihar, the Sher Shah Suri Masjid in Patna, the Qila-i-Kuhna Mosque inside the Purana Qila complex in Delhi, and the Sher Mandal, an octagonal building also inside the Purana Qila complex, which later served as the library of Humayun. He built a new city, Bhera, in present-day Pakistan in 1545, including within it a grand masjid named after him.

Sher Shah was responsible for greatly rebuilding and modernizing the Grand Trunk Road, a major artery which runs all the way from modern day Bangladesh to Afghanistan. Caravanserais (inns) and mosques were built and trees were planted along the entire stretch on both sides of the road to provide shade to travelers. Wells were also dug, especially along the western section. He also established an efficient postal system, with mail being carried by relays of horse riders.

The mausoleum of Sher Shah Suri was described as one of the most beautiful monuments in India, due to its grandeur and dignity. Cunningham even was inclined to prefer it over the Taj Mahal.

Among his reforms while consolidating the empire, Sher Shah abolished taxes at the borders of provinces to invigorate trade throughout India. Only two levies remained in place: one on goods being brought into the country and another when goods were sold. As a result, customs duties were entirely removed.

Sher Khan (1962), an Indian Hindi-language action film by Radhakant starring Kamaljeet in the titular role along with Kumkum, is ostensibly based on the emperor's life. Shershah Suri, a television show about the emperor, was aired on DD National by Doordarshan, the Indian national public broadcaster.

The Jungle Book, made by Rudyard Kipling, has its antagonist Shere Khan named after Sher Shah Suri.

• Isa Khan Niazi
• Khalji dynasty
• List of rulers of Bengal
• Jahangir Kabir (politician)
• History of Bangladesh
• History of India
• Shershabadia

Sher Shah Suri House of Sur Born: c. 1472/1486 Died: 1545
Regnal titles
New title Sur Empire established	Sultan of Hindustan 1538/1540-1545	Succeeded by Islam Shah Suri