McAndrew was born June 29, 1862 in Pennsylvania and graduated from West Point and the Army Staff College and War College. He was said to be a brilliant infantry officer. He was a Captain with the 3rd Infantry when he arrived in Skagway in 1905-6. In 1911 he was promoted to Major and when the Great War broke out he was a Lieutenant Colonel. By May 3, 1918, Major General McAndrew was appointed Chief of Staff of the American Expeditionary Forces in France under General Pershing. He served in that capacity for a year and then retired back to Washington D.C. and died at Walter Reed hospital on April 30, 1922 at the age of 60. He is buried in Arlington National Cemetery.
NY Times May 4, 1918