When Spain and Portugal united against Napoleon, they shocked the world by scoring stunning victories and seriously undermining his domination of Europe. Spain might seem temporarily crushed and Portugal defenceless, but despite Napoleon's best efforts, he could not bring the war to a close and his victories never proved decisive. Six years of hard campaigning followed. When Britain allied herself with Spain and Portugal and entered the field against Napoleon, he faced yet more failures. Meanwhile Wellington guided the British army to victory after victory. This is the third in four volumes providing a complete history of the Napoleonic wars. This title covers the long-drawn-out campaigns of the Spanish peninsula.