 The place of the battle, the castle Grynau, secured one of the few crossings over the Linth between Lake Zurich and Walensee and was therefore a strategically important place.In 1311 the castle was placed under the control of The Count Of Habsburg-Laufenburg (1270-1314), but was also claimed by the Counts of Toggenburg.The new mayor Rudolf Brun banished 22 noble councilors and their families from the city after the political reorganization.