when was the rank of chief petty officer established
Chief petty officer (United States) Chief Petty Officer (CPO) is the seventh enlisted rate (E-7) in the United States Navy and U.S. Coast Guard, just above petty officer first class and below senior chief petty officer. The rate of chief petty officer is that of a senior non-commissioned officer, and was established on 1 April 1893 for the United States Navy.[1] The United States Congress first authorized the Coast Guard to use the promotion to chief petty officer on 18 May 1920.[2] Chief petty officer is also the final cadet rate in the U.S. Naval Sea Cadet Corps.
Chief of Army Staff (Pakistan) In 1969, the title of the army command was changed from "Commander-in-Chief" to "Chief of Staff" with President Yahya Khan acting as Commander-in-Chief and General A.H. Khan as Chief of Staff.:contents[12] On 20 March 1972, the post was renamed as "Chief of Army Staff" (COAS) with Lieutenant-General Tikka Khan elevated to four star rank to be appointed as army's first chief of army staff.:62[13]