The III Corps of the Grande Armée was the designation of a few military units during the Napoleonic Wars. The III Corps came to prominence between 1805 and 1809 under the command of Marshal Louis-Nicolas Davout, when it repeatedly scored impressive victories single-handedly or in conjunction with other French forces. Napoleon called it "My tenth legion", in reference to Julius Caesar's finest unit, the X Equestris. Then troops from that Corps took part in many battles in Poland (1807) e.g. Czarnowo, Pultusk, Golymin, Eylau, in Bavaria at Teugen-Hausen, Eckmuhl and in Austria 1809 at Wagram. These troops later were reorganized as I Corps and included French, German/Polish units. It also included the 127th to 129th "régiment d'infanterie de ligne" from the north German countries of Oldenburg