tion of 19 cantons. Henceforth much of Swiss politics would concern balancing the cantons' tradition of self-rule with the need for a central government.
In 1815 the Congress of Vienna fully re-established Swiss independence and the European powers agreed to permanently recognise Swiss neutrality. Swiss troops still served foreign governments until 1860 when they fought in the Siege of Gaeta. The treaty also allowed Switzerland to increase its territory, with the admission of the cantons of Valais, Neuchâtel and Geneva. Switzerland's borders have not changed since.
Federal state
The restoration of the power to the patriciate was only temporary. After a period of unrest with repeated violent clashes such as the Züriputsch of 1839, civil war broke out in 1847 when some of the Catholic cantons tried to set up a separate alliance (the Sonderbundskrieg). The war lasted for less than a month, causing fewer than 100 casualties, most of which were through friendly fire. However minor the Sonderbundskrieg seems to be when 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.
The war convinced most Swiss of the need for unity and strength towards its European neighbours. Swiss people from all strata of society, whether Catholic, Protestant, or from the liberal or conservative current, realised that the cantons would profit more if their economic and religious interests were merged.
Thus, while the rest of Europe was plagued by revolutionary uprisings, the Swiss drew up a constitution which provided for a federal layout, much of it inspired by the American example. This constitution provided for a central authority while leaving the cantons the right to self-government on local issues. Giving credit to those who favoured the power of the cantons (the Sonderbund Kantone), the national assembly was divided between an
