When Mantua fell, and Austria saw herself driven from Italy, she had called her ablest general, the Archduke Charles, from the Rhine, and given him an army of over one hundred thousand men to lead against Bonaparte. The French had been reënforced to some seventy thousand, and though twenty thousand were necessary to keep Italy quiet, Bonaparte had a fine army, and he led it confidently to meet the main body of the enemy, which had been sent south to protect Trieste. Early in March he crossed the Tagliamento, and in a series of contests, in which he was uniformly successful, he drove his opponent back, step by step, until Vienna itself was in sight, and in April an armistice was signed. In May the French took possession of Venice, which had refused a French alliance, and which was playing a perfidious part, in Bonaparte’s judgment, and a republic on the French model was established. Italy and Austria, worn out and discouraged by this “war of principle,” as Napoleon called it, at last compromised, and on October 17th, one year, seven months, and seven days after he left Paris, Napoleon signed the treaty of Campo Formio. By this treaty France gained the frontier of the Rhine and the Low Countries to the mouth of the Scheldt. Austria was given Venice, and a republic called the Cisalpine was formed from Reggio, Modena, Lombardy, and a part of the States of the Pope. The military genius that this twenty-seven-year-old commander had shown in the campaign in Italy bewildered his enemies and thrilled his friends. “Things go on very badly,” said an Austrian veteran taken at Lodi. “No one seems to know what he is about. The French general is a young blockhead who knows nothing of the regular rules of war. Sometimes he is on our right, at others on our left; now in front, and presently in our rear. This mode of warfare is contrary to all system, and utterly insufferable.” It is certain that if Napoleon’s opponents never knew what he was going to do, if his generals themselves were frequently uncertain, it being his practice to hold his peace about his plans, he himself had definite rules of warfare. The most important of these were: “Attacks should not be scattered, but should be concentrated.” “Always be superior to the enemy at the point of attack.” “Time is everything.” To these formulated rules he joined marvelous fertility in stratagem. The feint by which, at the beginning of the campaign, he had enticed Beaulieu to march on Genoa, and that by which, a few days later, he had induced him to place his army near Valenza, were masterpieces in their way.