<P> During the presidency of Porfirio Díaz, documents conveyed from the U.S. Consulate in Mexico kept the Secretary of State in Washington, D.C. informed about Mexican affairs . The Secretary of State told President Taft of the buildup to possible regime change in Mexico, when Díaz was unable to control rebellions in various areas of Mexico . Initially, Taft did not want to intervene but wanted to keep the Díaz government in power to prevent problems with business relations between the two countries, such as the sales of oil between Mexico and the United States . </P> <P> U.S. Ambassador to Mexico H.L. Wilson helped to plot the February 1913 coup d'état, during the Ten Tragic Days (la decena trágica), which overthrew Francisco I. Madero . However, the Ambassador might have done this without the explicit approval of lame duck President Taft, but Ambassador Wilson had secured the support of the foreign diplomatic corps in Mexico, especially the British, German, and French envoys, for the coup and lobbied for U.S. recognition of the new head of state, General Victoriano Huerta . </P> <P> Woodrow Wilson was inaugurated president in March 1913, but the coup d'état in Mexico was an established fact, with the democratically elected president Madero murdered and his family in exile . President Wilson recalled Ambassador Wilson to Washington and later replaced him . President Wilson was horrified at the murders of President Madero and Vice President Pino Suárez and breaking from long - standing practice to recognize de facto regimes did not recognize the Huerta as the legitimate head of the Mexican government . A series of rebellions broke out in Mexico against Huerta's regime, especially in the North (Sonora, Chihuahua, and Coahuila), and continuing fighting in Morelos under Emiliano Zapata . Unlike the brief rebellions that helped bring Madero to power in 1910 - 11, Mexico descended into civil war . However, the involvement of the U.S. in larger conflicts with its diplomatic and economic rivals in Mexico, particularly Great Britain and Germany, meant that foreign powers affected the way the Mexican situation played out . </P> <P> When U.S. agents discovered that the German merchant ship, the Ypiranga, was carrying arms to Huerta's regime, President Wilson ordered troops to the port of Veracruz to stop the ship from docking . The U.S. did not declare war on Mexico city but the U.S. troops carried out a skirmish against Huerta's forces in Veracruz . The Ypiranga managed to dock at another port, which infuriated Wilson . </P>

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