approach to dealing with the Indian communities of the Pampas, however, was completely different from Alsina's, who had ordered the construction of a ditch and a defensive line of small fortresses across the Province of Buenos Aires. Roca saw no way to end native attacks (malones) but by putting under effective government control all land up to the Río Negro in a campaign (known as the Conquest of the Desert) that would "extinguish, subdue or expel" the Indians who lived there. "He began the campaign against the Ranqueles", which eventually resulted in the "transfer of 35% of national territory from the Indians to local caudillos. This land conquest would also strengthen Argentina's strategic position against Chile. He devised a "tentacle" move, with waves of 6,000 men cavalry units stemming coordinately from Mendoza, Córdoba, Santa Fé and Buenos Aires in July 1878 and April 1879 respectively, with an official toll of nearly 1,313 Native Americans killed and 15,000 taken as prisoners, and is credited with the liberation of several hundred European hostages. First presidency In mid-1879, after the death of Alsina, Roca became the most prestigious leader of the National Autonomous Party, and was proposed as a candidate by Cordoba's governor Miguel Celman, and in Buenos Aires by the doctor Eduardo Wilde; quickly gained the support of most of the Argentine state governors. The April 11 elections for president, which came a sweeping victory for the voters of Roca, except in Buenos Aires and Corrientes. On June 13 the Electoral College met and elected President General Roca and Vice President Francisco Bernabé Madero. But in Buenos Aires it was brewing a revolution against the triumph of Roca. Four days later the fighting began, which ended on June 25 with an agreement between the province and the nation; the revolution of 1880 had cost 3,000 dead. Shortly before the presidential inauguration Roca was passed in Congress federalization of Buenos Aires. Under his mandate the so-called "laicist laws" (Leyes Laicas) were passed, which nationalized a series of functions that previously were under the control of the Church. He also created the so-called Registro Civil, an index of all births, deaths and marriages. President Roca also made primary education free of charge by nationalizing education institutions run by the Church. This led to a break in relations with the Vatican. Roca presided over an era of rapid economic development fueled by large scale European