The Kienthal Conference was held in Kiental between 24 and 30 April 1916. The conference was a follow-on from the Zimmerwald Conference of the previous year, which Vladimir Lenin described as the "first step" in the development of an international movement against World War I. The manifesto drawn up by the Kienthal Conference was an advance on the Zimmerwald Manifesto and helped to crystallize the internationalist elements of whom the Communist Third International was subsequently formed.