I want to know the answer to the following question:
Russia failed to help Austria during what war that took place in 1866?
All the background I'm provided with is that "Furthermore, Russia did not do anything to assist its former ally, Austria, in the 1866 Austro-Prussian War:433 with its loss of Venetia and more important than that, its influence in most German-speaking lands.". Is that enough to answer the question?