Before the emergence of the Singh Sabha Movement in the late 19th century, they controlled important Sikh shrines, including the Harimandir Sahib for a short while. However, during the Akali movement of the 20th century, the Khalsa Sikhs expelled them from the Sikh shrines, accusing them of vices and of indulging in ritual practices that were against the teachings of the Sikh gurus. The Sikh Gurdwara Reform Act, 1925 defined the term "Sikh" in a way that excluded the syncretic groups like Udasis, Nanakpanthis, and other groups who maintained transitional identities. Subsequently, the Udasis increasingly identified themselves as Hindus rather than Sikhs.