Entered the Army and obtained commission as Major 1742; Lieutenant-colonel 1744; colonel 1746. Sent to America with the 50th Regiment 1756, superseded Shirley and Webb in command of the Army; and then resigned command to Lord Loudoun. In 1757commanded second brigade against Louisburg. On Loudoun's recall became Commander in Chief, 1758. Led expedition against Ticonderoga, with Lord Howe as second in command. On Howe's death , the campaign became a dismal failure for the british, Abercromby being out generaled at every point by Montcalm. Returned to England and in 1772 deputy general of Stirling Castle.
Tiré de Burpee, Lawrence J., Encyclopedia of Canadian History, Makers of Canada Series, vol 12, 1927.