Duffy's special interest was the military history of the European
modern age, in particular the history of the
German,
Prussian, and
Austrian armed forces. He wrote two books on the
Jacobite Rising in Scotland in 1745. He was most famous for his writings about
Frederick the Great and the
Seven Years' War. Duffy was fluent in six languages and published some twenty books about military history topics, several of which have been translated into German.
Duffy died on 16 November 2022, at the age of 86.[1][2]
Works
The Wild Goose and the Eagle: A Life of
Marshal von Browne, 1705-1757, Chatto & Windus, 1964.
Fire and Stone: The Science of Fortress Warfare, 1660-1860, David & Charles, 1975,
ISBN0715365576.
The Army of Maria Theresa: The Armed Forces of Imperial Austria, 1740-1780, Vancouver 1977,
ISBN0715373870. (Superseded by the two volume The Austrian Army in the Seven Years War in 2000 (
ISBN1883476194) and 2008.)