The Burgundian Wars (1474–1477) were a conflict between the Burgundian State and the Old Swiss Confederacy and its allies. Open war broke out in 1474, and the Duke of Burgundy, Charles the Bold, was defeated three times on the battlefield in the following years and was killed at the Battle of Nancy in 1477. The Duchy of Burgundy and several other Burgundian lands then became part of France, and the Burgundian Netherlands and Franche-Comté were inherited by Charles's daughter, Mary of Burgundy, and eventually passed to the House of Habsburg upon her death because of her marriage to Maximilian I, Holy Roman Emperor.