Valois Burgundy's territorial appetite frightened the Swiss Confederacy, leading to the Burgundian Wars (1474–1477). Charles the Bold's armies suffered two large defeats in 1476, at Grandson and Morat. The Duke of Lorraine took advantage of that and took Nancy back. With a weakened army, Duke Charles persevered and wanted to besiege Nancy as quickly as possible. The union of the Swiss and Lorrainer armies defeated the Burgundians during the battle of 5 January 1477, in which Charles the Bold was killed.