Gen. David Howell Petraeus
"...Upon his graduation from West Point in 1974, Petraeus was commissioned an infantry officer. After completing Ranger School (Distinguished Honor Graduate and other honors), Petraeus was assigned to the 509th Airborne Battalion Combat Team, a light infantry unit in Vicenza, Italy. Ever since, light infantry has been at the core of his career, punctuated by assignments to mechanized units, unit commands, staff assignments, and educational institutions. After leaving the 509th as a first lieutenant, Petraeus began a brief association with mechanized units when he became assistant operations officer on the staff of the 2nd Brigade, 24th Infantry Division (Mechanized) at Fort Stewart, Georgia. In 1979, he assumed command of a company in the same division: ALPHA Company, 2nd Battalion, 19th Infantry Regiment (Mechanized), and then served as that battalion's operations officer, a major's position that he held as a junior captain. In 1988–1989, he also served as operations officer to the 3rd Infantry Division (Mechanized)'s 1st Battalion, 30th Infantry Regiment (Mechanized) and its 1st Brigade...."
Reference: wikipedia.org .