For more information on the Colorado "strike war," see the note to the FSC of May 7, 1914. Tensions had risen steadily between the United States and Mexico during the first four months of 1914. The assassination of reformist president Francisco Madero during the previous year and the subsequent establishment of Victoriano Huerta's military dictatorship had drawn Mexico into civil war. While the Wilson Administration supported efforts to restore constitutional democracy in Mexico, it resisted direct inter-vention despite repeated border violations and the murder of a U.S. diplomat. However, the "Tampico incident" forced a change in U.S. policy. On April 9, 1914, the News reported that Huerta's forces had fired upon American-owned oil refineries in that port city. The Wilson Administration sent the U.S. Navy to safeguard the oil interests and demanded that Huerta publically apologize by firing a salute to the American flag. Huerta, however, refused and on April 16 the U.S. Marines occupied Tampico and Vera Cruz. By May 14, the date of the present FSC, the U.S. occupation had become an uneasy standoff and war seemed imminent. Prior to this intervention the News had been quick to escalate Mexican "incidents" into "outrages"; now, however, it moderated its tone, running editorials opposing further involvement in Mexico's internal affairs and counselling mediation through Latin American governments.