Frederick had sided in 1442 against the confederacy in the Old Zürich War where he had supported the city of Zürich, and he also refused to reconfirm the imperial immediacy of the members of the Confederacy.
Fridrik je stao 1442. protiv Konfederacije u Starom züriškom ratu, gdje je podupirao grad Zürich, i on je također odbijao potvrditi carsku neposrednost članova Konfederacije.