The session of 1530 attempted to calm rising tensions over Protestantism. After the Edict of Worms had condemned Lutheranism, problems of enforcement emerged during the 1520s, as Charles V's wars against France and commitments in the rest of his empire prevented him from focusing on German religious problems. In 1529, however, he signed a successful peace treaty with France. After these successes, Charles aimed to assert his control over what he saw as German religious heresies. It brought forth the Confessio Augustana, a central document of Lutheranism that was presented to emperor Charles V.