First War of Kappel
The First War of Kappel was an armed conflict in 1529 between the Protestant and the Catholic cantons of the Old Swiss Confederacy during the Reformation in Switzerland. It ended, without any single battle having been fought, with the first peace of Kappel.
Background
Led by Huldrych Zwingli, the Protestant Canton and City of Zürich had concluded with other Protestant cantons a defensive alliance, the Christliches Burgrecht, which also included the free imperial cities of Konstanz and Strasbourg. The Catholic cantons responded by forming an alliance with Ferdinand of Austria.Conflicts between the two religions arose also over the situation in their territories, especially the Thurgau, where the administration changed biannually between cantons and so switched between Catholic and Protestant rules. Several mediation attempts failed, such as the disputation of Baden in 1526.
Numerous minor incidents and provocations occurred on both sides, such as a Catholic priest being executed in the Thurgau in May 1528 and the Protestant pastor J. Keyser being burned at the stake in Schwyz in 1529. The last straw was the installation of a Catholic vogt at Baden.