Prussia was now the ablest as well as the bitterest of Napoleon's foes, Stein, Bluecher, Gneisenau, and their friends aiming at nothing short of annihilating the Napoleonic power. This was, no doubt, due in part to a thirst for revenge; but in the main it was due to the longing for such a leadership in Germany as would spread abroad the new doctrines of liberal and constitutional monarchy, in order to restrain Austria's ever-increasing influence. The councils of the allies presented an amusing spectacle. The Prussians urged an immediate advance by the best line for invasion, that, namely, from Liege and Brussels; but the Austrians, except Radetzky, drew back, fearing Prussia almost equally with France. The Czar held the balance, but his scales were very sensitive, inclining often toward Prussia, but settling in the end to a compromise suggested by Schwarzenberg and Metternich. Having imitated Napoleon in his practice of war requisitions, the allies now determined to imitate him in contempt for international law, and to violate Swiss neutrality. The plan which they adopted was to throw their main army into France by way of Basel, and thus turn the line of frowning fortresses behind the Rhine, as well as the Vosges Mountains. Bluecher was to cross the middle Rhine, and Buelow, with thirty thousand men, was to cooeperate with the English troops under Graham in the Netherlands. The whole scheme was unmilitary, but it exactly suited Metternich, who, having on January thirteenth first learned of Bernadotte's understanding with the Czar about the crown of France, was very uneasy. Both he and Schwarzenberg desired to end the war on the frontier, if possible; Prussia's power and Alexander's ambitions for European preponderance were far more dangerous to Austria than a Napoleonic empire confined to France. Bluecher, leaving twenty-eight thousand men before Mainz, crossed the Saar on January ninth with forty-seven thousand; Schwarzenberg, with the main army arrayed in four columns, two hundred and nine thousand strong, crossed the Rhine at or near Basel and moved toward Langres. The thin, straggling French columns began to retreat concentrically toward Chalons on the Marne. At the opening of the second stage in the campaign Bluecher had invested the Mosel fortresses, and was advancing, with less than thirty thousand men, toward Arcis on the Aube; Schwarzenberg was in and about Langres; and the French were concentrated on a line from Vitry-le-Francois to St. Dizier. Napoleon reached Chalons on the twenty-sixth, having left Joseph to represent him in Paris. The wily strategist, feeble as was his strength, had momentarily secured the advantage over his unwieldy foe, having wedged himself between the invading armies, and being quite strong enough, with the forty thousand soldiers in his ranks, to cope with Bluecher. CHAPTER VI NAPOLEON'S SUPREME EFFORT[6]