"If you were the King of Prussia would you take the risk of a 2 front war? Poland-Lithuania is a Congress Power so if Russia gos for them they go for the entire European Congress, if the Polish Army is in Prussia it may suffer losses, but the combined Congress powers would doubtless push the Russians back out eventually."
They wouldn't take the risk of a 2 fronted war, particulary with there leader dead now, i feel this brotherhood could do more damage than good (inless its a secret french controlled group
) however a 4 way alliance Prussia, Russia, Austria and Britian could casue some trouble for the french.
They only need to put a little pressure on the french system and cracks will begin to show, countrys will take the chance to gain proper independence.
What about the Baltic? could Sweden and Denmark help in anyway?