Editing Reformation (section)

===Confessions===
[[File:Rijksdag van Augsburg, 1530 Ware ende eygenlycke afbeeldinghe van de hooch aensienlycke vergaderinge gehouden int jaer 1530 den 25 juny op den bisschoplycken sael binnen de stadt Augsborch (titel op object), RP-P-OB-46.329.jpg|thumb|[[Charles V, Holy Roman Emperor]] receives the [[Augsburg Confession]], 1530]]
Back in Germany in January 1530, {{nowrap|Charles V}} asked the Protestants to summarize their theology at the following Diet in [[Augsburg]]. As the imperial ban prevented Luther from attending the Diet, Melanchthon completed the task. Melanchthon sharply condemned Anabaptist ideas and adopted a reconciliatory tone towards Catholicism but did not fail to emphasize the most featuring elements of Evangelical theology, such as justification by faith alone. The twenty-eight articles of the ''[[Augsburg Confession]]'' were presented at the Diet on 25 June. Four south German Protestant cities—Strasbourg, Constance, Lindau, and Memmingen—adopted a separate confessional document, the ''[[Tetrapolitan Confession]]'' because they were influenced by Zwingli's Eucharistic theology. On Charles's request, Eck and other Catholic theologians completed a response to the ''Augsburg Confession'', called {{lang|la|[[Confutatio Augustana|Confutatio]]}} ('refutation'). Charles ordered the Evangelical theologians to admit that their argumentation had been completely refuted. Instead, Melanchthon wrote a detailed explanation for the Evangelical articles of faith, known as the ''[[Apology of the Augsburg Confession]]''.{{sfn|Cameron|2012|p=192}}{{sfn|Lindberg|2021|pp=221-224}}

Charles wanted to attack the Protestant princes and cities but the Catholic princes did not support him fearing that his victory would strengthen his power. The Diet passed a law prohibiting further religious innovations and ordering the Protestants to return to Catholicism until 15 April 1531. Luther had previously questioned the princes' right to resist imperial power, but by then he had concluded that a defensive war for religious purposes could be regarded as a [[Just war theory|just war]].{{sfn|Lindberg|2021|pp=224–226}} The [[Schmalkaldic League]]—the Protestant Imperial Estates' defensive alliance—was signed by five princes and fourteen cities on 27 February 1531.{{refn|group=note|Electoral Saxony, Hesse, [[Duchy of Brunswick-Lüneburg|Brunswick-Lüneburg]], [[Anhalt-Köthen]], [[County of Mansfeld|Mansfeld]], Strasbourg, Ulm, Constance, Reutlingen, Memmingen, Lindau, [[Biberach an der Riß]], Isny im Allgäu, [[Lübeck]], [[Magdeburg]], and [[Bremen]] were the founding members of the Schmalkaldic League.{{sfn|Lindberg|2021|p=352}}}} As a [[Siege of Güns#Campaign of 1532|new Ottoman invasion]] prevented the Habsburgs from wage war against the Protestants, a peace treaty was signed at Nuremberg in July 1532.{{sfn|Cameron|2012|pp=351–352}}