It was embodied in 1778, at which time it was ranked the 36th regiment of militia, and remained active for around a decade.
In 1780, it was stationed in London during the Gordon Riots.
It was embodied again in 1793 for the French Revolutionary Wars, ranked as the 45th, and disembodied in 1802.
With the resumption of hostilities in 1803, it was embodied again (as the 29th), and disembodied with the peace in 1814.
In 1860, it amalgamated with the Rutland Militia to form the Northampton and Rutland Militia, which would later become the Special Reserve battalion of The Northamptonshire Regiment.