and attacks, Bern attempted another invasion across the Grimsel Pass with about 13,000 men. Bern was joined in the invasion by Fribourg, Solothurn, Neuchâtel, and a few troops from Schwyz. Both Uri and Unterwalden refused to send troops to either side of the conflict. The Bernese army marched through the canton burning villages as they came. Lacking support from their allies and outnumbered, the Valais troops generally retreated. However, in September 1419 near the village of Ulrichen a force of 400 to 600 under the leadership of Thomas Brantschen ambushed and fought the Bernese army to a standstill. Fearing that winter storms would soon close the mountain passes the Bernese forces withdrew back over the mountains, followed by a force of 500 Valaisans. The Valais rebels were now isolated and had lost many of their homes while Bern had suffered heavy losses from a small force at Ulrichen. Both sides were now ready to negotiate. Aftermath Both sides met together at Zug late in 1419 with the Duke of Savoy as their mediator. On 25 January 1420 a final treaty was issued. Valais was to return the Baron of Raron's castles and lands and pay him 10,000 florins for his losses. They were to also pay Bern 10,000 florins, the Bishop of Sion 4,000 and the Duke of Savoy 1,000. Valais accepted the terms but continued to resist the Baron at every opportunity and continued to self-govern. With his authority damaged, his castles burned and a sullen population, the Baron abandoned Valais and died in Rome in 1431. The compromise reached in 1419 at Zurich reinforced the supremacy of the Confederation over the alliances of the individual members. See also List of battles of the Old Swiss Confederacy First Battle of Ulrichen References Ulrichen Ulrichen