High Quality Content by WIKIPEDIA articles! Stephen Jones Chamberlin was a lieutenant general in the United States Army who served during World War II as General of the Army Douglas MacArthur`s Assistant Chief of Staff, G-3, the staff officer in charge of plans and operations. Born in Spring Hill, Kansas on 23 December 1889, he was a 1912 graduate of the United States Military Academy at West Point, New York. During World War I, he was aide-de-camp to Major General David C. Shanks, the Port of Embarkation commander at Hoboken, New Jersey, for which he was one of twelve Army officers who received the Navy Cross.