U.S. military involvements with Mexico in this period had the same general commercial and political causes, but stand as a special case. The Americans conducted the Border War with Mexico from 1910–1919 for additional reasons: to control the flow of immigrants and refugees from revolutionary Mexico (pacificos), and to counter rebel raids into U.S. territory. The 1914 U.S. occupation of Veracruz, however, was an exercise of armed influence; not an issue of border integrity; it was aimed at cutting off the supplies of German munitions to the government of Mexican leader Victoriano Huerta, which U.S. President Woodrow Wilson refused to recognize. In the years prior to World War I, the U.S. was also alert to the regional balance of power against Germany. The Germans were actively arming and advising the Mexicans, as shown by the 1914 arms-shipping incident, German saboteur Lothar Witzke's base in Mexico City, the 1917 Zimmermann Telegram and the German advisors present during the 1918 Battle of Ambos Nogales. Only twice during the Mexican Revolution did the U.S. military occupy Mexico: during the temporary occupation of Veracruz in 1914 and between 1916 and 1917, when U.S. General John Pershing led U.S. Army forces on a nationwide search for Pancho Villa. Haiti, occupied by the U.S. from 1915–1934, which led to the creation of a new Haitian constitution in 1917 that instituted changes that included an end to the prior ban on land ownership by non-Haitians. This period included the First and Second Caco Wars. Honduras, where the United Fruit Company and Standard Fruit Company dominated the country's key banana export sector and associated land holdings and railways, saw insertion of American troops in 1903, 1907, 1911, 1912, 1919, 1924 and 1925. The writer O. Henry coined the term "banana republic" in 1904 to describe Honduras. Other Latin American nations were influenced or dominated by American economic policies and/or commercial interests to the point of coercion. Theodore Roosevelt declared the Roosevelt Corollary to the Monroe Doctrine in 1904, asserting the right of the United States to intervene to stabilize the economic affairs of states in the Caribbean and Central America if they were unable to pay their international debts. From 1909–1913, President William Howard Taft and his Secretary of State Philander C. Knox asserted a more "peaceful and economic" Dollar Diplomacy foreign policy, although that too was backed by force, as in Nicaragua. American fruit companies The first