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 (<answer>the Sonderbundskrieg</answer>) broke out in 1847 when some Catholic cantons tried to set up a separate alliance (the Sonderbund). The war lasted for less than a month, causing fewer than 100 casualties, most of which were through friendly fire. Yet however minor <answer>the Sonderbundskrieg</answer> 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.
What was the name of the Swiss civil war in 1839?
the Sonderbundskrieg