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