RAKHI SYSTEM, the arrangement whereby the Dal Khalsa during the middecades of the eighteenth century established their sway over territories not under their direct occupation. Rakhi, lit. `protection` or `vigilance,` referred to the cess levied by the Dal Khalsa upon villages which sought their protection against aggression or molestation in those disturbed times. The establishment of Dal Khalsa in 1748 coincided with the first of a series of invasions by Ahmad Shah Durrani which further weakened the already crumbling administration of the Mughals.
ZAIN KHAN (d. 1764), an Afghan, was appointed governor of Sirhind in March 1761 by Ahmad Shah Durrani. Earlier he had acted as Faujdar of Char Mahal the four districts of Sialkot, Gujrat, Pasrur and Aurarigabad. This was from 1759 when Karim Dad Khan was appointed governor of the Punjab by the Afghan invader. For his relentless campaign against the Sikhs and for his part in die Vadda Ghallughara ( 5 February 1762), or Great Carnage, at the village of Kup Rahira near Malerkotia, Zain Khan had become a special target of their vengeance. Within four months of the Ghallughara they attacked Sirhind with a strong force, inflicting upon him a severe defeat and laying him under tribute.