Col. John L. Mayer (left) passes the colors to Col. Willard A. Buhl (right). Mayer served as the commanding officer since July 2010 and will move on to serve as the chief of staff for amphibious operations for the 1st Division Royal Australian Army. - Col. John L. Mayer (left) passes the colors to Col. Willard A. Buhl (right). Mayer served as the commanding officer since July 2010 and will move on to serve as the chief of staff for amphibious operations for the 1st Division Royal Australian Army.