Peter the Hermit
In 1128, Amadeus extended his realm, known as the "Old Chablais", by adding to it the region extending from the Arve to the Dranse d'Abondance, which came to be called the "New Chablais" with its capital at Saint-Maurice. Despite his marriage to Mahaut, he still fought against his brother-in-law Guy, who was killed at the Battle of Montmélian. Following this, King Louis VI of France, married to Amadeus' sister Adélaide de Maurienne, attempted to confiscate Savoy. Amadeus was saved by the intercession of Peter the Hermit, and by his promise to participate in Louis' planned crusade.