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
Sarbat Khalsa Sahib on the Akal Takht of Harmandir Sahib. Members put proposals up for consideration and the Panj Piare intervened in disputes that came up during the assembly. A proposal passed by the Sarbat Khalsa, known as a "Gurmata" (The Guru's decision) was binding on all Sikhs. Sarbat Khalsa 2015 was held on November 10, 2015 in the Chabba village on the outskirts of Amritsar, with the purpose to strengthen all Sikh institutions and traditions. As many as 100,000 to over 500,000 Sikhs from around the world attended the event. A few Sikh organizations did not attend the event and refused