But after the great defeat of the Protestants in 1547, in the battle of Muhlberg, the city found itself quite isolated in southern Germany.
John Frederick, the elector, was defeated at Muhlberg, April 1547, and taken prisoner.
With Maurice, elector of Saxony, he persuaded Philip, landgrave of Hesse, to surrender to Charles after the imperial victory at Muhlberg in April 1547, and pledged his word that the landgrave would be pardoned.
At Muhlberg in April 1547 he overtook the army of the Saxon elector.
An attempt at accommodation failed; Charles fled into Carinthia; and at one stroke all the advantages which he had gained by his triumph at Muhlberg were lost.