, conducted the revolution in Buenos Aires Province and installed a revolutionary governor. In 1893, with his government weak, Sáenz Peña invited del Valle to serve as
Minister of War, with additional functions giving him almost the power of a prime minister. This presented an unbeatable opportunity for the UCR. The first armed insurrection began on July 28 in
San Luis Province, directed by
Teófilo Saa. The revolutionaries quickly took control, forcing the governor to resign and installing Saa as interim governor. A second insurrection broke out in
Santa Fe on July 30. After several days of bloody fighting, the revolutionaries, led by
Lisandro de la Torre and others, defeated the provincial government, headed by
Juan Manuel Cafferata—one of the few PAN members who had assumed power legitimately. On August 4, they installed radical
Mariano Candioti as governor. The rebellion in
Buenos Aires Province, led by Yrigoyen himself, was the largest and best-organized. It began simultaneously in 82 cities, at dawn on July 30. The radical army ended up with 8,000 well-armed men, under the direct command of
Marcelo T. de Alvear at first and Martin Yrigoyen later. Their headquarters was in
Temperley, in the vicinity of the city of
Buenos Aires. The revolution triumphed everywhere in the province. On August 8 they took the capital and installed as interim governor
Juan Carlos Belgrano. Soon after, however, they made several strategic errors. First, del Valle (supported by Yrigoyen) refused to depose Sáenz Peña in a coup, as demanded by Alem and most of the other radical leaders. He proposed instead a plan for free elections which was approved by the
Senate but defeated in the
Chamber of Deputies. Second, Yrigoyen freed Pellegrini, who had been arrested in
Haedo by the revolutionaries. Once released, Pellegrini returned to the capital and rallied PAN supporters. Third, del Valle left the
Casa Rosada for Temperley, to be present at the surrender of arms. On August 11, Pellegrini and
Julio Argentino Roca took the opportunity to go to the Congress and win support for the suppression of the insurrections in Buenos Aires, San Luis and Santa Fe, all held by revolutionary governments. Alem urged del Valle to lead the radical army back to Buenos Aires and stage a coup. Instead, del Valle resigned from the cabinet on August 12, being replaced by
roquista Manuel Quintana. On August 25 the State Committee of the Radical Civic Union decided to surrender their weapons and the revolution effectively stopped. ==Second phase: August 14–September==