Religious differences were accentuated by a growing economic discrepancy. The Catholic, predominantly rural central-Swiss cantons were surrounded by Protestant cantons with increasingly commercial economies. The politically dominant cantons were Zürich and Berne (both Protestant), but the Catholic cantons were influential since the Second War of Kappel in 1531. A 1655 attempt (led by Zürich) to restructure the federation was blocked by Catholic opposition, which led to the first battle of Villmergen in 1656; the Catholic party won, cementing the "status quo". The problems remained unsolved, erupting again in 1712 with the second battle of Villmergen. This time the Protestant cantons won, dominating the confederation. True reform, however, was impossible; the individual interests of the thirteen members were too diverse, and the absolutist cantonal governments resisted all attempts at confederation-wide administration. Foreign policy remained fragmented.