It is in the present territory of Saint-Denis-lès-Martel, on the slopes of the Puy d'Issolud, formerly Uxellodunum, the last battle for the conquest of Gaul by Julius Caesar occurred during the summer of 51 B.C. after the shocks of Gergovia and Alésia in 52 B.C.. This ultimate victory in the land of the "Cadurques", that marked the beginning of the Roman occupation of all Gaul, was acquired by a ruse of Caesar who besieged the Gauls of the Uxellodunum oppidum with his legionaries and dug underground galleries that deprived the occupants of their main water supply (the current fountain of Loulié).