Despite the failure to bring the various parties together into a single congress, each faction would hold its own conferences during the war. The German, Austrian, and Hungarian pro-war parties successfully met at the Vienna Socialist Conference of 1915. The pro-war parties in the allied powers successfully met four times at the Inter-Allied Socialist Conferences of World War I. Anti-war parties first met as representatives from the neutral countries at the Neutral Socialist Conferences during the First World War, then as part of the Zimmerwald movement which successfully convinced the neutral, pacifist and revolutionary parties to split from the international. The Zimmerwald movement would lead to a much greater schism between the reformist and revolutionary wings of the international, which would eventually result in the Third International.