Swabian War
1499 CE.
Shown on the map at 46.799°, 8.232°.
The Swabian War of 1499 (Alemannic German: Schwoobechrieg; spelling depending on dialect), called Schwabenkrieg or Schweizerkrieg ("Swiss War") in Germany and Engadiner Krieg ("War of the Engadin") in Austria, was the last major armed conflict between the Old Swiss Confederacy and the House of Habsburg. What had begun as a local conflict over the control of the Val Müstair and the Umbrail Pass in the Grisons soon got out of hand when both parties called upon their allies for help; the Habsburgs demanding the support of the Swabian League, while the Federation of the Three Leagues of the Grisons turned to the Swiss Eidgenossenschaft. Hostilities quickly spread from the Grisons through the Rhine valley to Lake Constance and even to the Sundgau in southern Alsace, the westernmost part of the Habsburg region of Further Austria. Many battles were fought from January to July 1499, and in all but a few minor skirmishes, the experienced Swiss soldiers defeated the Swabian and Habsburg armies. After their victories in the Burgundian Wars, the Swiss had battle tested troops and commanders.
Text from the Wikipedia article Swabian War, licensed CC BY-SA 4.0.