As Philip the Good expanded his reach into the Holy Roman Empire, some Imperial Princes greeted him as a new ally, but others saw Burgundian expansion as a threat. Sigismund of Luxembourg, the Holy Roman Emperor, fell into the latter category, and throughout his long career he was a determined, if mostly ineffective opponent of Burgundy.

Time Period Covered: 1421-1437

Notable People: Philip the Good, Emperor Sigismund of Luxembourg, Rene of Anjou, Antoine de Vaudemont, Louis de Chalon Prince of Orange, Jean de Neufchatel, Arnold of Egmond Duke of Guelders, Adolph I of Cleves, Frederick of the Empty Pockets

Notable Events/Developments: Battle of Anthon, Battle of Bulgneville, The Hussite Wars