Since the Vendée held a considerable number of influential Protestants, including control by Jeanne d'Albret mother of Henry IV of France, the region was greatly affected by the French Wars of Religion which broke out in 1562 and continued until 1598. In April of that year King Henri IV issued the Edict of Nantes and the Wars came to an end. The revocation of the Edict of Nantes in 1685 caused many Huguenots to flee from the Vendée. In the void, the region became rigorously Catholic due to the influence of a preacher and Marian missionary Louis de Montfort who radically changed the spirituality of the region. Many attribute the effect of his preaching to prepare the Vendeans for their revolt against the French Revolution.