The Appenzell Wars (German: Appenzeller Kriege) were a series of conflicts that lasted from 1401 until 1429 in the Appenzell region of Switzerland. The wars were a successful uprising of cooperative groups, such as the farmers of Appenzell or the craftsmen of the city of St. Gallen, against the traditional medieval power structure represented by the House of Habsburg and the Prince-Abbot of the Abbey of St. Gall.
Appenzell (the name in Latin: abbatis cella means "cell (i.e. estate) of the abbot") had been under the personal control of the abbot of St. Gall. While the Prince-Abbot appointed agents or bailiffs, the communities in Appenzell were governed by a council appointed by the Landsgemeinde, in which every citizen could vote. The success of the Swiss Confederation, with similar Landsgemeinden, against the aristocratic Habsburgs encouraged the Appenzell citizens to consider throwing off the Abbot's agents. By about 1360, conflicts over grazing rights, taxes, and tithes were causing concern for both parties. Both the abbot and the farmers of Appenzell wanted to protect their rights and interests by joining the new Swabian League. In 1377 Appenzell was allowed to join the League with the support of the cities of Konstanz and St. Gallen (the city of St. Gallen was often at odds with the neighboring Abbey of St. Gall). With the support of League, Appenzell refused to pay many of the gifts and tithes that the Abbot Kuno von Stoffeln demanded. In response to the loss of revenue from his estates, Kuno approached the Austrian House of Habsburg for help. In 1392 he made an agreement with the Habsburgs, which was renewed in 1402. In response, in 1401 Appenzell entered into an alliance with the city of St. Gallen to protect their rights and freedom.