Peace of Passau
In 1625, despite the subsidies received from Spain and the Pope, Ferdinand was in a bad financial situation. In order to muster an imperial army to continue the war, he applied to Albrecht von Wallenstein, one of the richest men in Bohemia: the latter accepted on condition that he could keep total control over the direction of the war, as well as over the booties taken during the operations. Wallenstein was able to recruit some 30,000 men (later expanded up to 100,000), with whom he was able to defeat the Protestants in Silesia, Anhalt and Denmark. In the wake of these Catholic military successes, in 1629 Ferdinand issued the Edict of Restitution, by which all the lands stripped from Catholics after the Peace of Passau of 1552 would be returned.