From Wikipedia:
The Sonderbund war (German:
Sonderbundskrieg) of November 1847 was a civil war in
Switzerland. It ensued after seven Catholic cantons formed the
Sonderbund ("separate alliance", in German) in 1845 in order to
protect their interests against a centralization of power.
General Guillaume-Henri Dufour led the federal army of 100,000
and defeated the Sonderbund under Johann-Ulrich von Salis-Soglio
in a campaign that lasted only from November 3 to November 29,
and claimed fewer than a hundred victims. He ordered his troops
to care for the injured, anticipating the formation of the Red
Cross in which he participated a few years later.
In 1848, a new Swiss Federal
Constitution ended the almost-complete independence of the
cantons and transformed Switzerland into a federal state. The
Jesuits were banished from Switzerland. This ban was lifted on
20 May 1973, when 54.9% of the population and 16.5 cantons out
of 22 accepted a referendum modifying the Constitution.