In four campaigns, the Emperor transformed his "Carolingian" feudal republican and federal empire into one modelled on the Roman Empire. The memories of imperial Rome were for a third time, after Julius Caesar and Charlemagne, used to modify the historical evolution of France. Though the vague plan for an invasion of Great Britain was never executed, the Battle of Ulm and the Battle of Austerlitz overshadowed the defeat of Trafalgar, and the camp at Boulogne put at Napoleon's disposal the best military resources he had commanded, in the form of "La Grande Armée".