Renaud Verlaque wrote:
Fabian is right as I didn't pay attention to the positions. If the French occupy Brandenburg and outnumber the Allies (only Lestocq in this case) Prussia would normally surrender.
But the surrender would only happen after the Campaign phase, correct? At which point Prussia goes neutral and all Prussian forces on the map are removed. Then in the following Diplomacy phase France can create a dominion through card play.