Kammala jumla mai zuwa: An tsara kundin tsarin mulki na 1853 nan da nan bayan
Yaƙin Caseros, wanda ya ga shan kashi na Rosas, wanda ya mallaki ikon siyasa a Buenos Aires tsawon shekaru ashirin. Canjin yanayin siyasa ya bar Justo José de Urquiza a matsayin mai kula da harkokin kasa. A ranar 6 ga Afrilu, 1852, Urquiza ya yi taro tare da gwamnonin Vicente López y Planes na Buenos Aires, Juan Pujol na Corrientes, da wakilai na Santa Fe, inda aka yanke shawarar kira ga majalisa na majalisa a karkashin yarjejeniyar tarayya na 1831. An sanar da sauran larduna game da shawarar buɗe taron a watan Agusta na shekara mai zuwa.