The years spanning the period between 1829 and 1862 marked the first attempts at national political organization in Argentina. These confederal experiments contrasted opposing approaches, each embodied by strong personalities such as Juan Manuel de Rosas and Justo José de Urquiza. Rosas, governor of Buenos Aires with delegated Extraordinary Powers, based his authority on a network of alliances with various caudillos from different provinces. Urquiza, along with his successor Santiago Derqui, by contrast, appealed to the Constitution as the organizing principle. In 1853, this Constitution laid the juridical and political foundations that remain in force to this day. However, the dissent of Buenos Aires disrupted these initial objectives, which were only resolved in 1862 with the Battle of Pavón.