In 1947, Duch settled in London and became chairman of the Council of the World Polish Veterans' Association. He was the last General Inspector of the Armed Forces (from February 1980 until his death in October that year).
Promotions
1914: Lieutenant
1919: First Lieutenant
1919: Captain
1924: Major
1929: Lieutenant Colonel
1938: Colonel
1940: Brigadier
1945: Major General
Decorations
Knight's Cross of the Virtuti Militari (1 June 1945), Gold Cross (1940) and Silver Cross
Commandeur dans l'ordre de la Légion d'honneur ( décoré par le général Valentin Gouverneur Militaire de Metz en 1948 dans une caserne de Phalsbourg) Source: Roger Bruge "Les combattants du 18 Juin".