In defining the tradition of Austria's German policy between 1815 and 1870, Helmut Rumpler wrote recently that it was both consistent and contradictory. On the one hand it was characterized by a struggle against the establishment of Prussian hegemony in Germany while, on the other, it sought co-operation with Berlin based upon the unspoken but clear assumption of a shared or dualistic supremacy within the German Confederation. Far from wanting to weaken Prussia or significantly to diminish the role Berlin would play in either German or European affairs, Vienna was painfully aware of the importance of a strong Prussia for the maintenance of Austria's position as a European power. The problem of Prussia for Austrian policy was therefore the need to find ways to reconcile the necessity of opposing Prussia's ambitions with the equally obvious need to secure her co-operation and support. The dilemma facing Vienna was one of devising policies consistent with the fact that Prussia was at the same time Austria's most dangerous rival and her most important ally.