Unfortunately, we have no hard evidence that links Tsar Piotr to this secret warmongering. There is no way we can break up the alliance against us. The Tsar maneuvered carefully; if we want to deal with him we need to take care of the other countries first.
Good! If we want to have any chance of getting into Gorski, we need to make sure no-one can attack us from the rear.
Previous Quest: Meet the Tsar
Next Quest: Defeat General Feldmarschall Schledorf (it will appear if you have not yet acquired both Kriegreich and Ostrand) or The Road is Clear (if you have already acquired both Kriegreich and Ostrand)