Saxon army from Bohemia and then advanced against Gustavus Adolphus, whom he opposed near Nuremberg and, after the Battle of the Alte Veste, dislodged. In November, the great Battle of Lützen was fought, in which Wallenstein was forced to retreat but, in the confused melee, Gustavus Adolphus was killed. Wallenstein withdrew to winter quarters in Bohemia. In the campaigning of 1633, Wallenstein's apparent unwillingness to attack the enemy caused much concern in Vienna and in Spain. At this time the dimensions of the war had grown more European, and Wallenstein had begun preparing to desert the Emperor. He expressed anger at Ferdinand's refusal to revoke the Edict of Restitution. Historic records tell little about his secret negotiations but some sources indicated he was preparing to force a "just peace" on the Emperor "in the interests of united Germany". With this apparent "plan" he entered into negotiations with Saxony, Brandenburg, Sweden, and France. Apparently the Habsburgs' enemies tried to draw him to their side. In any case, he gained little support. Anxious to make his power felt, he resumed the offensive against the Swedes and Saxons, winning his last victory at Steinau on the Oder in October. He then resumed negotiations. Assassination In December, Wallenstein retired with his army to Bohemia, around Pilsen (now Plzeň). Vienna soon definitely convinced itself of his treachery, a secret court found him guilty, and the Emperor looked seriously for a means of getting rid of him (a successor in command, the later emperor Ferdinand III, was already waiting). Wallenstein was aware of the plan to replace him, but felt confident that when the army came to decide between him and the Emperor the decision would be in his favour. On 24 January 1634 the Emperor signed a secret patent (shown only to certain officers of Wallenstein's army) removing him from his command. Finally an open patent charging Wallenstein with high treason was signed on 18 February and published in Prague. In the patent, Ferdinand II ordered Wallenstein brought under arrest to Vienna, dead or alive. Losing the support of his army, Wallenstein now realized the extent of his peril, and on 23 February with a company of some hundred men, he went from Plzeň to Cheb, hoping to meet the Swedes under Prince Bernard. After his arrival at Cheb, however, certain senior Scottish and Irish officers in his force assassinated him on the night of