American Secretary of State William Jennings Bryan (1913–1915) worked energetically to promote international arbitration agreements, but his efforts were frustrated by the outbreak of World War I. Bryan negotiated 28 treaties that promised arbitration of disputes before war broke out between the signatory countries and the United States. He made several attempts to negotiate a treaty with Germany, but ultimately was never able to succeed. The agreements, known officially as "Treaties for the Advancement of Peace," set up procedures for conciliation rather than for arbitration. Arbitration treaties were negotiated after the war, but attracted much less attention than the negotiation mechanism created by the League of Nations.