Who was the first sergant majoe of the US Army

The rank and position were based on those of the Sergeant Major of the Marine Corps, established in its current incarnation on 23 May 1957. The Chief of Staff, Army, created the position in 1966, after asking leaders of the major commands for a personal recommendation. He asked that it not be considered a near retirement type assignment. He listed seven duties and functions he expected the sergeant major to perform, including service as a personal advisor and assistant to the Chief of Staff on matters pertaining to enlisted soldiers. From 4,700 proposed candidates, 21 nominees were selected. Finally chosen was the only one then serving in Vietnam, Sergeant Major William O. Wooldridge of the 1st Infantry Division.[2]