Book II.. State of the Empire.--of Europe.--Mansfeld.--Christian, Duke of

State of the Empire.--Of Europe.--Mansfeld.--Christian, Duke of Brunswick.--Wallenstein raises an Imperial Army at his own expense. --The King of Denmark defeated.--Death of Mansfeld.--Edict of Restitution in 1628.--Diet at Ratisbon.--Negociations.--Wallenstein deprived of the Command.--Gustavus Adolphus.--Swedish Army.--Gustavus Adolphus takes his leave of the States at Stockholm.--Invasion by the Swedes.--Their progress in Germany.--Count Tilly takes the Command of the Imperial Troops.--Treaty with France.--Congress at Leipzig.--Siege and cruel fate of Magdeburg.--Firmness of the Landgrave of Cassel.-- Junction of the Saxons with the Swedes.--Battle of Leipzig.-- Consequences of that Victory.