 On April 13, 1890, supporters of the Civic Union of the Youth established the Civic Union in a ceremony at the Buenos Aires Frontón.Leandro N. Alem was elected president and leaders were drawn from all tendencies within the anti-government movement, including Francisco A. Barroetaveña, José Manuel Estrada, Pedro Goyena, Aristóbulo del Valle, Bernardo de Irigoyen, Juan B. Justo, Lisandro de la Torre, and influential ex-president and general Bartolomé Mitre.The same year, supporters of the Civic Union, led by Leandro Alem and Bartolomé Mitre, instigated the Revolution of the Park, an armed uprising that ousted president Juárez Celman and replaced him with vice president Carlos Pellegrini.