Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Switzerland:

"

The restoration of power to the patriciate was only temporary. After a period of unrest with repeated violent clashes, such as the Züriputsch of 1839, civil war (the Sonderbundskrieg) broke out in 1847 when some Catholic cantons tried to set up a separate alliance (the Sonderbund).[2] The war lasted less than a month, causing fewer than 100 casualties, most of which were through friendly fire. The Sonderbundskrieg had a significant impact on the psychology and society of Switzerland.[citation needed]