I want to know the answer to the following question:
What countries did the federalist model fail in?
All the background I'm provided with is that "Tensions between territories can still be found in federalist countries such as Canada and federation as a way to appease and quell military conflict has failed recently in places like Lybia or Iraq, while the formula is simultaneously proposed and dismissed in countries such as Ukraine or Syria.". Is that enough to answer the question?
Answer: no