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In page Gian Galeazzo Visconti:

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In 1396, after the disaster of Nicopolis, Galeazzo was strongly suspected of having informed the Ottomans of the crusaders' plans and of the size and strength of their army as vengeance for his daughter being accused of being behind the illness of King Charles VI of France, and for France's increasing control over the city of Genoa that he had attempted to hamper, for which he had been rebuked by Enguerrand VII before the battle.[citation needed]