In June 1282 at Versoix, Amadeus and Béatrice “la Grande Dauphine”, the dowager Countess of Albon and regent for her son John I, came to an agreement whereby all the places that Amadeus' father and grandfather, William II, had been forced to cede to Peter “the Little Charlemagne” in 1250 and 1260—the so-called gagerie—would be returned to Geneva. The gagerie was originally to be held by Peter and his heirs until the Count of Geneva paid a war indemnity of 20,000 marks, later reduced to 10,000. Béatrice was Peter's only daughter and heir, and the widow of Guigues VII of Albon. In return for these lands, Amadeus granted to Béatrice suzerainty over certain lordships and agreed to take any allods within the returned gagerie as fiefs of her and her heirs, the Counts of Albon, instead. The treaty also created a mutual defensive alliance and cooperation in an offensive against "those detaining and possessing the properties and men belonging to the above-mentioned gagerie", that is, men of the house of Savoy, Béatrice's relatives. The conference of Versoix was under the presidency of Amadeus' uncl,e the Bishop of Geneva, who promised to help both parties so far as it did not threaten the rights of his diocese. The privilege of arbitrating disputes between Amadeus and Béatrice fell to Humbert I of La Tour-du-Pin, who was Béatrice's son-in-law as the husband of her daughter Anne. War with Savoy immediately broke out following the alliance between Amadeus and the Dauphine. By 1 November 1282 the Savoyards had attacked Avalon in the Dauphiné and Bellecombe in the Genevois. The castle of La Buissière in the Dauphiné was captured by Louis I of Vaud, who then invaded the Grésivaudan, while his brother Amadeus, marching from the Bresse, assaulted Moirans. These attacks caused the bishop to withdraw from the alliance and make peace with Philip I, Count of Savoy, the brothers' uncle. In February 1283 the Genevois and men form the Faucigny, enemies of Savoy, invaded the Savoyard castellany of Châtelard-en-Bauges and burned the village. In the Genevan citadel of Bourg-du-Four, agents of Count Philip fomented unrest in the city against both Amadeus II and the bishop. At this point in the spring of 1283 the emperor-elect Rudolf of Habsburg intervened against Savoy. Rudolf first attacked Morat and, failing in this, Payerne, where his assault was repulsed and the Louis of Vaud came to the city's defence. He then ordered the citizens of Fribourg to join the ‘imperial’ host and wrote to Amadeus II ordering him to invade Savoy an open up a “second front”. Although Amadeus received an offer of one hundred knights if he needed assistance, he does not appear to have actually opened up a “second front”, perhaps understanding better than the emperor the difficulty such an effort would face. Amadeus died 22 May 1308 apud lu Bacho, and was buried the next day at Montagny.
