Reference has already been made to the conflict maintained for six years by Great Britain against France for the liberation of Spain and Portugal, which has since been known in history as the Peninsular war. It had its origin in two events which occurred during the autumn of 1807 and the spring of 1808. The first was the secret treaty of Fontainebleau concluded between France and Spain at the end of October, 1807; the second was the outbreak of revolutionary movements at Madrid, followed by the intervention of Napoleon in March, April, and May, 1808. The treaty of Fontainebleau was a sequel of the vast combination against Great Britain completed by the peace of Tilsit, under which the continental system was to be enforced over all Europe. Portugal, the ally of this country and an emporium of British commerce, was to be partitioned into principalities allotted by Napoleon, the house of Braganza was to be exiled, and its transmarine possessions were to be divided between France and Spain, then ruled by the worthless Godoy in the name of King Charles IV. Whether or not the subjugation of the whole peninsula was already designed by Napoleon, his troops, ostensibly despatched for the conquest of Portugal under the provisions of the treaty, had treacherously occupied commanding positions in Spain, when the populace of Madrid rose in revolt, and, thronging the little town of Aranjuez, where the court resided, frightened the king into abdication. His unprincipled son, Ferdinand, was proclaimed in March, 1808, but Murat, who now entered Madrid as commander-in-chief of the French troops in that city, secretly favoured the ex-King Charles. In the end, both he and Ferdinand were enticed into seeking the protection of Napoleon at Bayonne. Instead of mediating or deciding between them, Napoleon soon found means to get rid of both. They were induced or rather compelled to resign their rights, and retire into private life on large pensions; and Napoleon conferred the crown of Spain on his brother Joseph, whose former kingdom of Naples was bestowed on Murat.