The position was almost an impregnable one, and they could receive reinforcements from Bohemia.
On the arrival of the Prussian army the king fled, and Dresden threw open its gates.

As Frederick hoped to detach Saxony from the alliance against him, the greater portion of the army were encamped outside the town; three or four regiments, only, marching in and quartering themselves in the empty Saxon barracks.

The aid Saxony could render Frederick would be insignificant, but it was most desirable for him that he should ensure its neutrality, in order to secure his communications with Prussia when he marched forward into Bohemia.
Finding the king had gone, his first step was to send a general officer, with a party of soldiers, to seize the archives in the palace.

Among these was discovered the prize he most desired to find; namely a signed copy of the secret treaty, between Austria, Russia, France, and Saxony, for the invasion and partition of Prussia.

Copies of this document were instantly sent off to the courts of Europe, thus affording an ample justification for what would otherwise have appeared a wholly unprovoked attack by Prussia upon her neighbours.