Between 1808 and 1814 Spain and Portugal were devastated by the single most destructive episode of the Napoleonic Wars, namely the so-called Peninsular War. Originating in a foolhardy attempt on the part of Napoleon to render the former country a more reliable ally in the wake of his bloodless occupation of the latter in October 1807, this soon turned sour. French armies sustained one embarrassing reverse after another; assailed by multiple problems, the puppet regime of Joseph Bonaparte was unable to impose its authority; the Spanish armies proved easy to beat but hard to eliminate; the British ejected the French from Portugal and turned her into an unassailable stronghold; the French suffered heavy casualties; and political revolution in Spain made it very hard to claim the ideological high ground. Had Napoleon been willing to concentrate all his efforts on the struggle, he might yet have prevailed, but his decision to attack Russia badly destabilised the position of his armies, the result being that within two years the whole of the Peninsula had been liberated. All this makes for a dramatic story, but in practice the impact of the Peninsular War on the fate of Napoleon was very limited, its real importance lying rather in its influence on the history of Spain and Portugal.