After Henry IV's death, Calvinists from Béarn attended the Huguenot conference at Saumur in 1611 in an effort to enlist their support for Béarnese and Navarrese independence. In 1614, the same year he came of age, Henry IV's successor, Louis XIII, was confronted by a Huguenot uprising supported by Béarn. In a meeting of the French Estates General that year, the Third Estate petitioned for the union of all sovereign provinces with France. In 1616 Louis issued an edict uniting the principality with France, but it was ignored.