Bündner Wirren

The Bündner Wirren; or Revolt of the Leagues
	Part of the Thirty Years' War
	; Monte Disgrazia 3,678m; the Valtellina Pass
Date	1618–1639
Location	Swiss canton of Graubünden
Result	The Three Leagues regain control of the Valtellina but allow free exercise of the Catholic faith.
Belligerents
The Three Leagues; Kingdom of France; Republic of Venice; Duchy of Savoy	Grison rebels ; Holy Roman Empire; Spain
Commanders and leaders
Jörg Jenatsch †; Henri, duke of Rohan; François Annibal d'Estrées	Pompeius Planta †; Gómez, duke of Figueroa

The Bündner Wirren (Romansh: Scumbigls grischuns/Scumpigls grischuns/Sgurdins grischuns, French: Troubles des Grisons, Italian: Torbidi grigionesi, English: Graubünden disturbances or Revolt of the Leagues) was a conflict that lasted between 1618 and 1639 in what is now the Swiss canton of Graubünden.

Initially a revolt by local Catholics against their Protestant overlords, many regional powers became involved as it potentially affected control of the Valtellina alpine passes. A loose alliance of France, Venice, and the Duchy of Savoy supported the Three Leagues against the Grison rebels, backed by the Habsburg monarchy. The conflict threatened to draw the Swiss Confederation into the Thirty Years War.