I want to know the answer to the following question:
What did Catholic cantons attempt to set up which caused a civil war in 1839?
All the background I'm provided with is that "Yet however minor the Sonderbundskrieg appears compared with other European riots and wars in the 19th century, it nevertheless had a major impact on both the psychology and the society of the Swiss and of Switzerland.". Is that enough to answer the question?
Answer: no