Bernese citizens, but with a few locals. When Bern converted during the Protestant Reformation in 1528, the Unteraargau also converted. At the beginning of the 16th century a number of anabaptists migrated into the upper Wynen and Rueder valleys from Zürich. Despite pressure from the Bernese authorities in the 16th and 17th centuries anabaptism never entirely disappeared from the Unteraargau. Bern used the Aargau bailiwicks mostly as a source of grain for the rest of the city-state. The administrative cities remained economically only of regional importance. However, in the 17th and 18th centuries Bern encouraged industrial development in Unteraargau and by the late 18th century it was the most industrialized region in the city-state. The high industrialization led to high population growth in the 18th century, for example between 1764 and 1798, the population grew by 35%, far more than in other parts of the canton. In 1870 the proportion of farmers in Aarau, Lenzburg, Kulm, and Zofingen districts was 34–40%, while in the other districts it was 46–57%. Freie Ämter The rest of the Freie Ämter were collectively administered as subject territories by the rest of the Confederation. Muri Amt was assigned to Zürich, Lucerne, Schwyz, Unterwalden, Zug and Glarus, while the Ämter of Meienberg, Richensee and Villmergen were first given to Lucerne alone. The final boundary was set in 1425 by an arbitration tribunal and Lucerne had to give the three Ämter to be collectively ruled. The four Ämter were then consolidated under a single Confederation bailiff into what was known in the 15th century as the Waggental Bailiwick (). In the 16th century, it came to be known as the Vogtei der Freien Ämter. While the Freien Ämter often had independent lower courts, they were forced to accept the Confederation's sovereignty. Finally, in 1532, the canton of Uri became part of the collective administration of the Freien Ämter. At the time of the Protestant Reformation, the majority of the Ämter converted to the new faith. In 1529, a wave of iconoclasm swept through the area and wiped away much of the old religion. After the defeat of Zürich in the second Battle of Kappel in 1531, the victorious five Catholic cantons marched their troops into the Freie Ämter and reconverted them to Catholicism. In the First War of Villmergen, in 1656, and the Toggenburg War (or Second War of Villmergen), in 1712, the Freie Ämter became the