Louis III, duke of Anjou and Touraine, count of Maine and Provence, and titular king of Naples and Sicily, advancing Angevin claims to the throne of Naples, has for a dozen years struggled with the Aragonese claimant Alfonso V, sometimes supported, sometimes opposed by the childless Queen Joan II of Naples, who in 1423 had renounced Alfonso and adopted Louis.

In April 1433, the capricious Joan disinherits Louis, only to readopt him in June.