Although Napoleon’s forces had originally met with considerable success in this war, conquering and subjugating several provinces, it was on this day that the Peninsular War started to go badly for Napoleon, at least symbolically.
The tiny province of Asturias, located on the shores of the Bay of Biscay, declared war on Napoleon and cast out its French governor. Within weeks, it had been joined by every other Spanish province. By August, French forces withdrew by Portugal, by October, they controlled only the two northernmost provinces of Spain, those closest to France. But here the tide turned once more, as Napoleon had fresh armies to draw upon and the Spanish none.
Mark Knopfler – Done With Bonaparte