While Congress was debating the resolution the American naval forces (on April 21) seized the Vera Cruz Custom House to prevent the landing of a munition cargo from a German ship. This led to sharp fighting and the occupation of the entire city. General Funston with a division of regulars was sent to relieve the naval landing parties; and war seemed inevitable. Even the Mexican revolutionaries showed a tendency to prefer Huerta to the intervention of the United States. But on April 25 the Governments of Argentina, Brazil and Chile proposed mediation, which Wilson and Huerta promptly accepted. A conference met at Niagara Falls, Ontario, and through May and June endeavored to reach a settlement not only between the United States and Mexico, but between the various Mexican factions. The President was still attempting to carry out his policy of August, 1913, and the chief obstacle was not Huerta, but Carranza, who had refused to consent to an armistice and for a long time would not send delegates to Niagara Falls. Meanwhile Huerta made one concession after another. Watchful waiting had indeed ruined him; for President Wilson's opposition had made it impossible for him to get any money in Europe--and in the early part of 1914 some European nations would still have considered Mexico a good risk. Moreover, from February to April the embargo on arms had been lifted, and the Constitutionalists armies in the north, munitioned from the United States, were steadily conquering the country. On July 15 Huerta resigned, and soon afterward sailed for Spain; and on August 20 Carranza entered Mexico City. Despite the criticism that had been heaped on the President's handling of the Tampico-Vera Cruz affair, he had got rid of Huerta without getting into war. A still more important consequence, the full effect of which was not immediately apparent, was the enormous increase in the confidence felt by Latin America in the good intentions of the Wilson Administration. The acceptance of A-B-C mediation in 1914 made possible the entry of most of the Latin-American powers into the European War in 1917 as allies of the United States. And for a time it was to appear as if this had been about the only tangible profit of the episode; for Carranza presently proved almost as troublesome as Huerta. The Fall of 1914 saw the outbreak of a new civil war between Villa and Carranza, in which Zapata, Villa's ally, for a long time held Mexico City. Obregon's victories in 1915 drove Villa back to his old hunting grounds.