the first chief of staff of pak army was
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]
Chief of Staff of the United States Army The current Chief of Staff of the Army is General Mark A. Milley.