The Siege of Cawnpore was a key episode in the Indian rebellion of 1857. The besieged Company forces and civilians in Cawnpore (now Kanpur) were unprepared for an extended siege and surrendered to rebel forces under Nana Sahib, in return for a safe passage to Allahabad. However, their evacuation from Cawnpore turned into a massacre, and most of the men were killed. As an East India Company rescue force from Allahabad approached Cawnpore, 120 British women and children captured by the Sepoy forces were killed in what came to be known as the Bibighar Massacre, their remains being thrown down a nearby well in an attempt to hide the evidence. Following the recapture of Cawnpore and the discovery of the massacre, the angry Company forces engaged in widespread retaliation against captured rebel soldiers and local civilians. The murders greatly embittered the British rank-and-file against the Sepoy rebels and inspired the war cry "Remember Cawnpore!".

Cawnpore was an important garrison town for the East India Company forces. Located on the Grand Trunk Road, it lay on the approaches to Sindh (Sind), Punjab and Awadh (Oudh).

By June 1857, the Indian rebellion had spread to several areas near Cawnpore, namely Meerut, Agra, Mathura, and Lucknow. However, the Indian sepoys at Cawnpore initially remained loyal. The British General at Cawnpore, Hugh Wheeler, knew the local language, had adopted local customs, and was married to an Indian woman.[1][2] He was confident that the sepoys at Cawnpore would remain loyal to him, and sent two British companies (one each of the 84th and 32nd Regiments) to besieged Lucknow.[3]

The British contingent in Cawnpore consisted of around nine hundred people, including around three hundred military men, around three hundred women and children, and about one hundred and fifty merchants, business owners, drummers (salesman), engineers and others. The rest were the native servants, who left soon after the commencement of the siege.[4]

In the case of a rebellion by the sepoys in Cawnpore, the most suitable defensive location for the British was the magazine located in the north of the city. It had thick walls, ample ammunition and stores, and also hosted the local treasury. However, General Wheeler decided to take refuge in the south of the city, in an entrenchment composed of two barracks surrounded by a mud wall.[4] There was a military building site to the south of Cawnpore, where nine barracks were being constructed at the dragoon barracks. The British soldiers found it difficult to dig deep trenches, as it was hot summer season. The area also lacked good sanitary facilities, and there was only one well (which would be exposed to enemy fire in case of an attack). Also, there were several buildings overlooking the entrenchment that would provide cover for the attackers, allowing them to easily shoot down on the defenders.

General Wheeler's choice of this location to make a stand remains controversial, given the availability of safer and more defensible places in Cawnpore.[4] It is believed that he was expecting reinforcements to come from the southern part of the city. He also assumed that, in case of a rebellion, the Indian troops would probably collect their arms, ammunition and money, and would head to Delhi and therefore, he did not expect a long siege.

The first sign of the rebellion at Cawnpore came in the form of a rebellion at Fatehgarh (or Futteghur), a military station on the banks of the Ganges. To disperse the Indian troops away from Cawnpore, and lessen the chances of a rebellion, General Wheeler decided to send them on various "missions". On one such mission, he sent the 2nd Oudh Irregulars to Fatehgarh. On the way to Fatehgarh, General Wheeler's forces under the command of Fletcher Hayes and Lieutenant Barbour met two more Englishmen, Fayrer and Carey.

On the night of 31 May 1857, Hayes and Carey departed to a nearby town to confer with the local magistrate. After their departure, the Indian troops rebelled and decapitated Fayrer. Barbour was also killed, as he tried to escape. When Hayes and Carey came back the next morning, an older Indian officer galloped towards them and advised them to run away. However, as the Indian officer explained the situation to them, the rebel Indian sowars (cavalry troopers) raced towards them. Hayes was killed as he tried to ride away, while Carey escaped to safety.[3]

Outbreak of rebellion at Cawnpore
There were four Indian regiments in Cawnpore: the 1st, 53rd and 56th Native Infantry, and the 2nd Bengal Cavalry. Although the sepoys in Cawnpore had not rebelled, the European families began to drift into the entrenchment as the news of rebellion in the nearby areas reached them. The entrenchment was fortified, and the Indian sepoys were asked to collect their pay one by one, so as to avoid an armed mob.[3]

The Indian soldiers considered the fortification, and the artillery being primed, as a threat. On the night of 2 June 1857, a British officer named Lieutenant Cox fired on his Indian guard while drunk. Cox missed his target, and was thrown into the jail for a night. The very next day, a hastily convened court acquitted him, which led to discontent among the Indian soldiers. There were also rumours that the Indian troops were to be summoned to a parade, where they were to be massacred. All these factors influenced them to rebel against the East India Company rule.[3]

The rebellion began at 1:30 AM on 5 June 1857, with three pistol shots from the rebel soldiers of the 2nd Bengal Cavalry. Elderly Risaldar-Major Bhowani Singh, who chose not to hand over the regimental colours and join the rebel sepoys, was subsequently cut down by his subordinates. The 53rd and 56th Native Infantry, which were apparently the most loyal units in the area, were awoken by the shootings. Some soldiers of the 56th attempted to leave. The European artillery assumed that they were also rebelling, and opened fire on them. The soldiers of the 53rd were also caught in the crossfire.[3]

The 1st N.I. rebelled and left in the early morning of 6 June 1857. On the same day, the 53rd N.I. also went off, taking with them the regimental treasure and as much ammunition as they could carry. Around 150 sepoys remained loyal to General Wheeler.[1]

After obtaining arms, ammunition and money, the rebel troops started marching towards Delhi to seek further orders from Bahadur Shah II, who had been proclaimed the Badshah-e-Hind ("Emperor of India"). The British officers were relieved, thinking that they would not face a long siege.

Nana Sahib's involvement
Nana Sahib was the adopted heir to Baji Rao II, the former peshwa of the Maratha Confederacy. The East India Company had decided that the pension and honours of the lineage would not be passed on to Nana Sahib, as he was not a natural born heir. Nana Sahib had sent his envoy Dewan Azimullah Khan to London, to petition the Queen against the Company's decision, but failed to evoke a favourable response. In May 1857, Nana Sahib arrived in Cawnpore with 300 soldiers, stating that he intended to support the British: Wheeler asked him to take charge of the government treasury in the Nawabganj area.[5]

Amid the chaos in Cawnpore in 1857, Nana Sahib entered the British magazine with his contingent. The soldiers of the 53rd Native Infantry, which was guarding the magazine, were not fully aware of the situation in the rest of the city. They assumed that Nana Sahib had come to guard the magazine on behalf of the British, as he had earlier declared his loyalty to the British, and had even sent some volunteers to be at the disposal of General Wheeler.[3] However, Nana Sahib joined the rebels.[5]

After taking possession of the treasury, Nana Sahib advanced up the Grand Trunk Road. His aim was to restore the Maratha Confederacy under Peshwa tradition, and he decided to capture Cawnpore. On his way, Nana Sahib met with rebel soldiers at Kalyanpur. The soldiers were on their way to Delhi, to meet Bahadur Shah II. Nana Sahib initially decided to march to Delhi and fight the British as a Mughal subordinate, but Azimullah Khan advised him that leading the rebels in Kanpur would increase his prestige more than serving a weak Muslim king.[5]

Nana Sahib asked the rebel soldiers to go back to Cawnpore, and help him in defeating the British. The rebels were reluctant at first, but decided to join Nana Sahib, when he promised to double their pay and reward them with gold, if they were to destroy the British entrenchment.