The Sikh Empire is usually told as the achievement of one man, and there is a good reason for that: Ranjit Singh was extraordinary, and he ruled for forty years. But he was nineteen years old when Lahore fell to him, he commanded a misl of middling weight, and he did not do it alone. The troops that took the city, and a great deal of the judgement that decided to try, belonged to his mother-in-law.
Sada Kaur has the strange distinction of being simultaneously essential to the founding of the Sikh Empire and almost entirely absent from the popular version of it.
A Widow at Twenty-Three
She was born in 1762, into the Sikh aristocracy of the Majha, and married into the Kanhaiya misl — one of the strongest of the twelve confederacies that had divided Punjab between them after the collapse of Mughal authority. Her husband was Gurbaksh Singh, son of the Kanhaiya chief Jai Singh.
In 1785 the misls did what misls did, and fell out. In the fighting against the Sukerchakia and Ramgarhia confederacies, Gurbaksh Singh was killed. Sada Kaur was twenty-three, with a young daughter, inside a military household that had just lost its heir and was expected to spend the next generation avenging him.
She did the opposite, and she did it fast.
The Marriage
In 1786 she arranged the betrothal of her daughter Mehtab Kaur to the boy who was heir to the Sukerchakia misl — the confederacy that had been on the other side of the fight in which her husband died. His name was Ranjit Singh. He was about six years old.
Read one way this is a mother trading her daughter for peace, and the qisse of Punjab are full of the damage that arrangement does. Read another way it is one of the shrewdest political calculations of the period. Sada Kaur had looked at the map of the misls and worked out that the Kanhaiya and Sukerchakia together, welded by a marriage rather than a treaty, would be the largest single force in Punjab. She was right, and she made sure she was standing at the centre of it.
When Jai Singh died in 1789, she took command of the Kanhaiya misl in her own right — not as a regent for a male heir, but as its chief.
The Ride into Lahore
Ranjit Singh's father died when the boy was twelve, leaving him head of the Sukerchakia at an age when he could not have held it alone. From that point Sada Kaur functions in the record as something between an ally, a patron and a general. She kept the Kanhaiya forces at his disposal, she pressed him forward, and by every contemporary account she was a fighting commander rather than a distant sponsor.
The decisive moment came in 1799. Lahore was held by the Bhangi chiefs and was governed badly enough that its own citizens were petitioning for someone else. Ranjit Singh was nineteen. The venture was plausible only because Sada Kaur brought the Kanhaiya troops to it and, in doing so, told every watching chief in Punjab which way the wind had turned.
Lahore fell. Two years later, in 1801, Ranjit Singh was formally invested as Maharaja, at the age of twenty.
He was crowned at twenty because a woman of thirty-nine had spent thirteen years deciding that he would be.
The Long Estrangement
What followed is the part of the story that nobody arranges a marriage in anticipation of.
The relationship between Ranjit Singh and Mehtab Kaur was not a success, and he took other wives; his heir came from another marriage. Sada Kaur's leverage rested on the alliance, and the alliance rested on a marriage that had effectively failed. Meanwhile the thing she had built was becoming something that could not tolerate her: a state, not a confederacy. Ranjit Singh spent his reign absorbing the misls one by one, and by the 1810s the Kanhaiya was one of the last substantial independent blocks left inside the empire, run by the one person he could not simply outmanoeuvre.
Around 1821 he had her detained and annexed the Kanhaiya territories. She remained a prisoner for the rest of her life and died in 1832, aged about seventy.
Her grandson Sher Singh — Mehtab Kaur's son, born in 1807 — did eventually rule at Lahore in the disorder after Ranjit Singh's death, before being assassinated in 1843. By then the empire she had helped to make was four years from its first war with the British and eight from annexation.
Why She Vanished
Sada Kaur is not obscure because the sources are silent. She appears throughout the accounts of the period, including British ones, as a principal actor — a chief who commanded troops and negotiated with other chiefs on her own authority.
She is obscure because of the shape the story took afterwards. The Sikh Empire was remembered as the work of a single towering figure, and a founding myth of that kind has no comfortable place for a mother-in-law who supplied the army. That she ended her life as his prisoner made the omission easier still: there is no satisfying way to put her in the story without the story becoming considerably less flattering to its hero.
The plainest summary is the one the dates give. In 1799 a nineteen-year-old took the greatest city in Punjab, with somebody else's soldiers, on somebody else's judgement. Twenty-two years later he locked her up.