In the meanwhile no effort was spared by Maria Theresa to detach the Elector from the League of Frankfort.[328] Her diplomatic agents were Colloredo and Count Batthiany. Colloredo negotiated at Munich with humiliating terms of peace; Batthiany advanced upon Munich with an army eleven thousand strong, before which Ségur, with a small French force, had withdrawn to the Bavarian frontier. Accordingly, Chavigny and the Elector fled to Augsburg, where, on the 19th of April, a treaty of peace, dictated by the Austrian envoy, was signed by Maximilian. The event of the 19th of April was the signal for what M. de Broglie himself calls "the breakup and rout of all that in a greater or less degree was still holding to France."[329] The Prince of Hesse, the Elector Palatine, the Duke of Wurtemburg, and the Electors of Trèves and Mayence were at no pains to conceal their view that the French cause in Germany was lost; while the Elector of Saxony, Augustus himself, the very man upon whom for three months the efforts of French diplomacy had been centred, made haste to summon the troops of France to withdraw from the soil of the Empire, where there remained no excuse for their continued presence.[330] Such was the disaster d'Argenson had foreseen and endeavoured vainly to avert. He is said[331] to have cherished with blind fatuity an unfounded faith in the fidelity of Bavaria. That faith was more than justified, if we are to believe Chavigny, who said that up to the very day when the unhappy Elector was forced to abandon his capital to the Austrians, he remained firmly attached to the French alliance.[332] The truth is this: that not only at Munich, but at Dresden and Frankfort, d'Argenson's action must appear ridiculous; because, while prosecuting his negotiations with energy and enthusiasm, he was unable, through no fault of his own, to give them the weight of a single cannon-shot. In a word, the bold policy of the 31st of January, while actively prosecuted by the French Minister, was tacitly abandoned by the French Government. Of that fact Frederick needed no further evidence than the Convention of Augsburg. His mind was made up. He saw at once that the real object of that Government was, not the protection of German liberties, not the election of the King of Poland, not a decisive war and an honourable peace, but simply a holiday campaign in Flanders. He was utterly exasperated by the vain selfishness of the French policy, while his impatience at its continued tenderness for Saxony mounted to the brim.