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.
According to Friedrich Engels,
the Sonderbund war was about whether the Swiss nation would
develop into a modern capitalist nation with banking and trade
or remain pre-dominately a loose confederation cantons, each
based on subsistence agriculture.
The member cantons were Lucerne, Fribourg, Valais, Uri, Schwyz,
Unterwalden and Zug, all predominantly Catholic but then ruled
by Conservative administrations. The cantons of Ticino and
Solothurn, predominantly Catholic but then ruled by liberal
administrations, did not join the alliance.
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.