If only they could seriously threaten Germany. Humiliating Theodor, and sieging Vienna successfully should give their collective heads a shake. At no time outside of Russia being in existence has Germany ever really known fear outside of from within itself. Also the Triunes have opened themselves up for serious retribution from Rome. This is the second time they have meddled in the affairs of the White Palace while they fight a direct enemy, with their greed being their only reason to be involved, and no real threat to themselves. A cowing of the Triune sense of entitlement is due. I believe though it will be German armies buring Kings Landing, that will put that lesson to them.