The Schmalkaldic War, the short period of…
June 1547 CE
The Schmalkaldic War, the short period of violence from 1546 until 1547 between the forces of Charles V and the Schmalkaldic League within the domains of the Holy Roman Empire, began when Maurice, the Wettin Duke of Albertine Saxony, invaded the lands of his rival and stepbrother in Ernestine Saxony, John Frederick, for political reasons (both rulers are Protestant).
As John Frederick is co-founder of the Schmalkaldic League, his allies join him in a fight against the Catholics, including Charles V, who side with Maurice.
After the Imperial forces defeat those of John Frederick at Mühlberg in 1547, Maurice seizes the electoral lands and titles.
John Frederick receives, as compensation, the ducal title and Thuringia.
Although the imperial forces are soon victorious over the Protestant forces of the Schmalkaldic League, the ideas of Martin Luther had spread over the empire to the extent that they cannot be suppressed with physical force.
Official religious settlement will arrive eight years later in the form of the Peace of Augsburg.