Federalism in Switzerland

The rise of federalism in Switzerland began on 12 September 1848, with the creation of a federal constitution in response to a 27-day civil war, the Sonderbundskrieg. The 1848 constitution represented the first time, other than when the short-lived Helvetic Republic had been imposed, that the Swiss had a central government instead of being simply a collection of autonomous cantons bound by treaties.

Source: Wikipedia — Federalism in Switzerland (CC BY-SA 4.0)