Explanation:

Chamkaur Sahib is a town located in the Ropar district of Punjab. It is famous for the First and Second Battle of Chamkaur fought between Sikhs and the treacherous mughals.
Upon the fall of Sirhind to the Khalsa in 1764 when this part of the country came under Sikh domination, the fortress at Chamkaur came to be preserved as a sacred monument. Maharaja Karam Singh of Patiala had a Gurdwara constructed here. It was called Garhi Sahib; also, Tilak Asthan (Anointment Site) in the belief that Guru Gobind Singh's act of obeying the five Sikhs with regard to his escape from Chamkaur fort and giving his dress, daster and kalgi to Bhai Sangat Singh were symbolic of anointing the Khalsa as his successor to Guruship.