A reconstituted national government, the Cortes of Cádiz—in effect a government-in-exile—fortified itself in the secure port of Cádiz in 1810, but could not raise effective armies because it was besieged by 70,000 French troops. British and Portuguese forces eventually secured Portugal, using it as a safe position from which to launch campaigns against the French army and provide whatever supplies they could get to the Spanish, while the Spanish armies and guerrillas tied down vast numbers of Napoleon's troops. By restricting French control of territory, the combined allied forces, both regular and irregular, prevented Napoleon's marshals from subduing the rebellious Spanish provinces, and the war continued through years of stalemate.