In 1906, Morales resigned, and Horacista vice-president Ramon Cáceres became president. After suppressing a rebellion in the northwest by Jimenista General Desiderio Arias, his government brought political stability and renewed economic growth, aided by new American investment in the sugar industry. However, his assassination in 1911, for which Morales and Arias were at least indirectly responsible, once again plunged the republic into chaos. For two months, executive power was held by a civilian junta dominated by the chief of the army, General Alfredo Victoria. The surplus of more than 4 million pesos left by Cáceres was quickly spent to suppress a series of insurrections. He forced Congress to elect his uncle, Eladio Victoria, as President, but the latter was soon replaced by the neutral Archbishop Adolfo Nouel. After four months, Nouel resigned and was succeeded by Horacista Congressman José Bordas Valdez, who aligned with Arias and the Jimenistas to maintain power. In 1913, Vásquez returned from exile in Puerto Rico to lead a new rebellion. In June 1914 U.S. President Woodrow Wilson issued an ultimatum for the two sides to end hostilities and agree on a new president, or have the United States impose one. After the provisional presidency of Ramón Báez, Jimenes was elected in October, and soon faced new demands, including the appointment of an American director of public works and financial advisor and the creation of a new military force commanded by U.S. officers. The Dominican Congress rejected these demands and began impeachment proceedings against Jimenes. The United States occupied Haiti in July 1915, with the implicit threat that the Dominican Republic might be next. Jimenes's Minister of War Desiderio Arias staged a coup d'état in April 1916, providing a pretext for the United States to occupy the Dominican Republic.