1740-42 and 44-45
The first War 1740-42
On their new territory, the organized Prussian army was soon able to hold all Silesia. In one step, Prussia had doubled its population and made huge gains in its industrial productivity.
The second War 1744-46
The attention and resources of Maria Theresa's Austria were fully occupied, and the Prussians were almost unopposed. One column passed through Saxony while another advanced from Silesia.
An Austrian contingent joined the Saxons, a move was made in the direction of Berlin from Saxony and from Bohemia. The danger was very great. Frederick hurried up his forces from Silesia and marched as rapidly as possible on Dresden. The Saxons and their allies were completely routed after a hard struggle, and Maria Theresa at last gave way.
In the Peace of Dresden Frederick recognized the imperial election, and retained Silesia at the Peace of Breslau.