Though Louis XV. could make no effectual resistance, it was not in human nature but that he should seek revenge. When shepherds quarrel, they kill each other's flocks. When kings quarrel, they kill the poor peasants in each other's territories, and burn their homes. France succeeded in enlisting in her behalf Spain and Sardinia. Austria and Russia were upon the other side. Prussia, jealous of the emperor's greatness, declined any active participation. Most of the other powers of Europe also remained neutral. France had now no hope of placing Stanislaus upon the throne; she only sought revenge, determined to humble the house of Austria. The mercenary King of Sardinia, Charles Emanuel, was willing to serve the one who would pay the most. He first offered himself to the emperor, but upon terms too exorbitant to be accepted. France and Spain immediately offered him terms even more advantageous than those he had demanded of the emperor. The contract was settled, and the Sardinian army marched into the allied camp. The King of Sardinia, who was as ready to employ guile as force in warfare, so thoroughly deceived the emperor as to lead him to believe that he had accepted the emperor's terms, and that Sardinia was to be allied with Austria, even when the whole contract was settled with France and Spain, and the plan of the campaign was matured. So utterly was the emperor deluded by a fraud so contemptible, in the view of every honorable mind, that he sent great convoys of grain, and a large supply of shot, shells and artillery from the arsenals of Milan into the Sardinian camp. Charles Emanuel, dead to all sense of magnanimity, rubbed his hands with delight in the successful perpetration of such fraud, exclaiming, "_An virtus an dolos, quis ab hoste requirat_." So cunningly was this stratagem carried on, that the emperor was not undeceived until his own artillery, which he had sent to Charles Emanuel, were thundering at the gates of the city of Milan, and the shot and shells which he had so unsuspectingly furnished were mowing down the imperial troops. So sudden was the attack, so unprepared was Austrian Lombardy to meet it, that in twelve weeks the Sardinian troops overran the whole territory, seized every city and magazine, with all their treasures, leaving the fortress of Mantua alone in the possession of the imperial troops. It was the policy of Louis XV. to attack Austria in the remote portions of her widely-extended dominions, and to cut off province by province. He also made special and successful efforts to detach the interests of the German empire from those of Austria, so that the princes of the empire might claim neutrality. It was against the possessions of Charles VI., not against the independent States of the empire, that Louis XV. urged war.