What is "gummenenkrieg"

The Gümmenenkrieg was a war between the emergent city-states of Bern and Fribourg in 1331-33 in what is now Switzerland. The war pitted Bern and the new Swiss Confederation against the Habsburg-supported city of Fribourg and local nobles. It was also the first in a series of battles that brought the Habsburgs and Fribourg into prominence in the County of Burgundy. The war ended without resolving anything and led to other wars between Bern and Fribourg.