Nigeria's film history can be partitioned into four eras: the Colonial period: 1903-1960; the Independence period: 1960-1972; the Indigenization Decree period: 1972-1992; and the Nollywood period, 1992-Present. The Colonial era begins with the first exhibition of film in Nigeria in August 1903 at the Glover Memorial Hall in Lagos. These films were largely documentaries. The motive for introducing the cinema to Nigeria by the British was largely political and, to a lesser extent, social. In the Independence period, the Nigerian Federal and States Film Unit replaced the colonial unit, but similarly concentrated on the production of mostly documentary and newsreel films. During the Indigenization Decree period, Nigerian filmmakers tried in vain to make successful films, as the Nigerian film industry attempted to promote the national in counterpoint to the influence of Lebanese and Indians who dominated the distribution and exhibition film sector in Nigeria.