Sikhism achieved a series of military victories and created a Sikh Empire in 1799. The Sikh empire had its capital in Lahore, spread over almost comprising what is now northwestern Indian subcontinent. The Sikh Empire entered into a treaty with the colonial British powers, with each side recognizing Sutlej River as the line of control and agreeing not to invade the other side. Ranjit Singh's most lasting legacy was the restoration and expansion of the Harmandir Sahib, most revered Gurudwara of the Sikhs, with marble and gold, from which the popular name of the "Golden Temple" is derived. After the death
Dal Khalsa (Sikh Army) for the period of a generation". In 1733, Zakariya Khan Bahadur attempted to negotiate a peace with the Sikhs by offering them a jagir, the title Nawab to their leader, and unimpeded access to the Harmandir Sahib. After discussion at a Sarbat Khalsa, Kapur Singh was elected leader of the Sikhs and took the title of Nawab. Nawab Kapur Singh combined the various Sikh militias into two groups; the Taruna Dal and the Budda Dal, which would collectively be known as the Dal Khalsa. Sikh militias over 40 years of age would be part of the Budda Dal and Sikh