The Indian Imperial Police, referred to variously as the Imperial Police or simply the Indian Police or, by 1905, Imperial Police, was part of the Indian Police Services, the uniform system of police administration in British India, as established by Government of India Act 1858, Police Act of 1861. It was motivated by the danger experienced by the British during the 1857 rebellion. During 1920 the Imperial Indian police had 310,000 police in their contingent. Its members policed more than 300 million people in India, Pakistan, Bangladesh and Burma (then comprising the British Raj). In 1948, a year after India's independence, the Imperial Police Service was replaced by the Indian Police Service, which had been constituted as part of the All-India Services by the Constitution. History It comprised two branches, the Superior Police Services, from which the Indian (Imperial) Police would later be formed, and the Subordinate Police Service. Until 1893, appointments to the senior grades (i.e., Assistant District Superintendent and above) were made locally in India, mainly from European officers of the Indian Army. The highest rank in the service was the Inspector General for each province. The rank of Inspector General was equated and ranked with Brigadier and similar ranks in the Indian Armed Forces, as per Central Warrant of Precedence in 1937. Subordinate to the Inspector General, the ranks were composed of District Superintendents and Assistant District Superintendents, most of whom were appointed, from 1893, by examination for the Indian Civil Service tests in the UK. The Subordinate Police Service consisted of Inspectors, Sub-Inspectors, Head Constables (or Sergeant in the City forces and cantonments) and Constables, consisting mainly of Indians except for the higher ranks. By the 1930s, the Indian Police exercised "unprecedented degree of authority within the colonial administration". The Indian Imperial Police was also the primary law enforcement in Burma, governed as a province of India, until 1937. Ranks of the Imperial (India) Police Superior Services: Inspector General of Police (Head of the state police) Deputy Inspector General of Police (Head of Range Police) or Commissioner of Four cities (Madras, Bombay, Calcutta and Rangoon) Superintendent of Police (Head of District Police) Assistant Superintendent of Police (Head of sub divisional Police, specially main sub division of a district) Sub-ordinate services: Deputy Superintendent of Police (Head of sub divisional Police). Inspector of Police (Head of circle Police) Sub Inspector of Police (Head of Police station) Sergeant (One