The Battle of Morgarten occurred on 15 November 1315, when the men of Schwyz, with support of their allies of Uri and Unterwalden, ambushed a Habsburg army under the command of Duke Leopold I on the shores of Lake Ägeri, in the territory of Schwyz.

The Habsburg army was routed, with numerous slain or drowned.

The Swiss victory consolidated the League of the Three Forest Cantons, which formed the core of the Swiss Confederacy.