History
The Doab has no boundary except its two rivers, and that single fact organises its whole history: it has almost never been a polity in itself, and has almost always been the corridor whoever held Delhi had to hold. Its ancient period is the densest in the northern plain — Alamgirpur, Hastinapura, Kannauj, Kaushambi all lie on it. Its medieval period begins in 606, when Harsha made Kanyakubja the seat of an empire and the interfluve became the prize of northern India for the next six hundred years, and it closes at Chandawar near Firozabad in 1194. Its modern period begins in 1801, not 1857, when the Nawab of Awadh ceded these districts to the East India Company: everything that makes the modern Doab legible — the canal, the realigned trunk road, the sugarcane belt, the single-craft towns, the mills at Kanpur and the standard language taken from Upper Doab speech — is a nineteenth-century construction run the length of the interfluve because nothing stood in its way. Authority here was also rarely dynastic at the local level. In the upper Doab it sat with Jat and Gujjar clan assemblies, which is why the risings of 1857 there had no court behind them.
Periodisation is regional, not national — the medieval period does not begin in the same century here as it does elsewhere in India.
Ancientc. 2000 BCE – c. 600 CE
The interfluve carries an almost continuous archaeological sequence. Alamgirpur on the Hindon, in Meerut district, is the easternmost Harappan site known, which places the eastern limit of that civilisation on this ground. A thousand years later the Painted Grey Ware settlements — Hastinapura, Atranjikhera and others — mark the earliest iron-using agricultural villages of the plain; the excavation of Hastinapura in 1950–52 found a flood horizon that cut the occupation, and made the site the type-sequence for the whole upper Ganga valley. At the southern end, Kaushambi was the capital of Vatsa, one of the sixteen mahajanapadas, with a rampart circuit that is still among the largest early historic earthworks in India. The stone pillar that stood there and now stands in the fort at Prayagraj carries three separate layers of writing across a thousand years — Ashoka's edicts, Samudragupta's eulogy composed by Harishena, and a Mughal inscription — which is as compact a summary of this corridor as exists.
Medieval606 – 1801
Harsha's move to Kanyakubja in 606 made the middle Doab the political centre of northern India, and for four centuries afterwards possession of Kannauj was the definition of paramountcy — the Gurjara-Pratiharas, the Palas of Bengal and the Rashtrakutas of the Deccan fought over it for a hundred and fifty years, and the Pratiharas held it from about 816. The Gahadavalas ruled from Kannauj and Varanasi in the twelfth century and left the richest body of land grants in northern India, which is why the twelfth-century Doab is better documented than most of the centuries around it. That ended at Chandawar on the Yamuna in 1194. Under the Sultanate and then the Mughals the interfluve was not a province with a character but the empire's dependable revenue core, and its towns specialised early — Kannauj in perfume, Firozabad in glass, Aligarh in metal — because a market corridor makes specialisation pay. The eighteenth century turned it into a thoroughfare for everybody else's armies.
Modern1801 – 1947
The modern Doab is engineered. The Nawab of Awadh ceded these districts in 1801; within two generations the Company had realigned the trunk road down the spine of the interfluve and dug the Ganges Canal from Haridwar, a main channel of some 560 kilometres opened on 8 April 1854, with an engineering college founded at Roorkee in 1847 to staff it. The canal made the sugarcane and gur belt of the upper Doab, and the belt in turn made the mills. Kanpur, chosen because the road, the river and later the railway met there, became the largest industrial town between Bombay and Calcutta after the Elgin Mills opened in 1864, and with the mills came a working class, a trade union movement and, in 1929, the largest political trial of the interwar period. Aligarh's Muhammadan Anglo-Oriental College of 1875 and Allahabad's High Court, university and Congress sessions gave the corridor three separate political traditions within a hundred and fifty kilometres of each other.
Rulers and commanders
Harsha Maharajadhiraja Ruler 606–647
Moved the seat of northern Indian power to Kannauj in the middle Doab, where it stayed for six hundred years. His court and his reign are described at length by Banabhatta and by the Chinese pilgrim Xuanzang.
Dynasty: Pushyabhuti. Seat: Kanyakubja
Nagabhata II Maharajadhiraja Ruler c. 800–833
Took Kannauj about 816 and made it the Pratihara capital, ending the first phase of the three-cornered contest with the Palas and the Rashtrakutas for the interfluve.
Dynasty: Gurjara-Pratihara. Seat: Kannauj
Govindachandra Maharaja Ruler c. 1114–1155
The strongest ruler of his line. His copper-plate grants are the single richest source for land, revenue and settlement in the twelfth-century Doab.
Dynasty: Gahadavala. Seat: Kannauj and Varanasi
Jayachandra Maharaja Ruler c. 1170–1194
Defeated and killed at Chandawar on the Yamuna in 1194. The battle ended Gahadavala rule and opened the whole interfluve to Delhi within a decade.
Dynasty: Gahadavala. Seat: Kannauj
Muhammad Khan Bangash Nawab Founder 1714–1743
Founded Farrukhabad in 1714 and built one of the few durable eighteenth-century polities inside the Doab. His campaign into Bundelkhand in 1728–29 brought the Marathas north of the Narmada.
Dynasty: Bangash of Farrukhabad. Seat: Farrukhabad
Nana Sahib Claimant to the title of Peshwa Rebel born c. 1824
Resident at Bithur, where the last Peshwa had been pensioned; his claim to continue that pension was refused. He led the rebel forces at Kanpur from June 1857 and disappeared after 1859.
Dynasty: Adopted heir of Baji Rao II. Seat: Bithur, near Kanpur
Walidad Khan Nawab of Malagarh Commander active 1857–58
Appointed by the Delhi court to hold Bulandshahr in 1857 and fortified Malagarh, from which he commanded operations on the Delhi road until the fort was taken and destroyed later that year.
Seat: Malagarh, Bulandshahr district
Dhan Singh Kotwal of Meerut Administrator active 1857
Head of the Meerut town police in May 1857, from the Gujjar village of Panchli. His exact part on 10 May is disputed — the fullest accounts, which credit him with leading villagers to the jail, are later than the events — but he left his post, was tried, and was hanged.
Seat: Meerut