Sonderbund War in the context of "Swiss neutrality"

The periods of Restoration and Regeneration in Swiss history lasted from 1814 to 1847. "Restoration" is the period of 1814 to 1830, the restoration of the Ancien Régime (federalism), reverting the changes imposed by Napoleon Bonaparte on the centralist Helvetic Republic from 1798 and the partial reversion to the old system with the Act of Mediation of 1803. "Regeneration" is the period of 1830 to 1848, when in the wake of the July Revolution the "restored" Ancien Régime was countered by the liberal movement. In the Protestant cantons, the rural population enforced liberal cantonal constitutions, partly in armed marches on the cities. This resulted in a conservative backlash in the Catholic cantons in the 1830s, raising the conflict to the point of civil war by 1847.

The rise of Switzerland as a federal state began on 12 September 1848, with the creation of a federal constitution in response to a 27-day civil war, the Sonderbundskrieg.

The constitution, which was heavily influenced by the United States Constitution and the ideas of the French Revolution, was modified several times during the following decades and wholly replaced in 1999. 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.