This defeat was the death-blow to Wallenstein's fortunate career. The Swedes continued to carry on the war successfully under the able minister of Gustavus, Oxenstiern, and the valiant Duke of Weimar. Meantime Wallenstein, after some slight victories in Saxony and Silesia, remained inactive. He at the same time assumed an air of extreme pride and self-sufficiency, which exasperated his enemies and gave occasion for their slanders. He was accused to Ferdinand of designing to seize the Empire,--a charge which seemed the more credible, on account of an offer having been made by France to assist him in obtaining the Bohemian crown. This proposition, however, he had firmly refused. The emperor's intention of removing him from the command of the army having reached his ears, he declared he would resign, but was persuaded to remain by his officers, who at a great banquet, all, with wild and perhaps drunken enthusiasm, signed a promise of inviolable attachment to his person. This, too, was interpreted by his enemies as a conspiracy against the emperor. His destruction was resolved on by the Duke of Bavaria and others, among whom an Italian mercenary general, named Piccolomini, was the most perfidious and savage. A plot was formed against him by certain traitors among his own officers,--the names of Devereaux, Butler, Gordon, and Leslie, to the shame of their nations, appearing in the list.
On February 25, 1634, an entertainment was given to the whole body of officers by Gordon, who commanded the castle of Eger, where Wallenstein was residing. He himself being indisposed, had retired from the table to his chamber. He was roused by loud cries proceeding from the mess-room, where his faithful officers were being murdered by the traitors. He opened the window to inquire the cause of the disturbance, when Devereaux entered, with thirty Irishmen at his back. The cowards shrank at the sight of their great general, standing calm and stern, unarmed, and at their mercy. But Devereaux, a callous and brutal soldier, in a moment stepped forward, and cried: "Art thou the traitor who wilt ruin the Empire?" Wallenstein did not speak, but opened his arms, as if to accept the blow which was aimed at his heart. He was slain at the age of fifty-one. His wealth was chiefly shared among his enemies.