Burgdorferkrieg

They then got promises of military support from Savoy, Neuchâtel and for the first time, based on the Federal Charter of 1353, the Swiss Confederation.

[2] Bern began the war by attacking Neu-Kyburg vassals in the Emmental and Oberaargau regions.

The Bernese-Solothurn army was supported with troops from the Forest Cantons, Lucerne, Zurich, Neuchatel and Savoy and were armed with catapults and primitive guns.

On 5 April 1384, the Neu-Kyburgs agreed to sell the towns and castles of Burgdorf and Thun to Bern for 37,800 guilders.

These two towns would allow Bern to expand into the Bernese Oberland, the Emmental and largest markets in the region.

They were not allowed to move freely, had limited military rights and mandatory Confederation arbitration in disputes.