In 1812, Duka commanded the 2nd Brigade of the 2nd Cuirassier Division, and later commanded the division itself. For his actions at Smolensk and Borodino, Duka was awarded the Order of St. Anna (1st Class) and for the battles of Tarutino and Maloyaroslavets—the Order of St. Vladimir (2nd Class). In 1813, Duka was promoted to lieutenant general (27 September), fought at Leipzig and was wounded in the head. In 1814 he participated in the capture of Paris. He was awarded the Prussian Order of the Red Eagle and the Austrian Order of St. Leopold.