Both Bourbon powers hoped to benefit by diverting British troops from Germany to Portugal , while Spain hoped to seize Portugal and its empire .
Portugal was given four days to answer , after which the country would face an invasion by the forces of France and Spain .
Both Bourbon powers hoped to benefit by diverting British troops from Germany to Portugal , while Spain hoped to seize Portugal and Portugal 's empire .
Portugal was given four days to answer , after which the country would face an invasion by the forces of France and Spain .