 Frederick V of Habsburg and III of Germany at this time requested the return of Grüningen to Habsburg, but the intercession of Bern, in the so-called "Berner Spruch" of 17 March 1441, prevented the loss of Grüningen (which would have left a Habsburg-owned enclave within the Swiss Confederacy after the re-admission of Zürich in 1450).With the renewed hostilities of 1443, Grüningen was besieged again, during 11 to 16 July, and the garrison surrendered once again.The attackers killed Zürich reeve Peter Kilchmann in spite of having offered safe conduct.