led to the Cisplatine War between the imperials and the Argentine from the United Provinces of the Río de la Plata to control the region. Three years later, the United Kingdom intervened in the question by proclaiming a tie and creating in the former Cisplatina a new independent country: The Oriental Republic of Uruguay. Later in 1836, while Brazil was experiencing the chaos of the regency, Rio Grande do Sul proclaimed its independence motivated by a tax crisis. With the anticipation of the coronation of Pedro II to the throne of Brazil, the country could stabilize and fight the separatists, which the province of Santa Catarina had joined in 1839. The Conflict came to an end by a process of compromise by which both Riograndense Republic and Juliana Republic were reincorporated as provinces in 1845. The Peru–Bolivian Confederation, a short-lived union of Peru and Bolivia, was blocked by Chile in the War of the Confederation (1836–1839) and again during the War of the Pacific (1879–1883). Paraguay was virtually destroyed by Argentina, Brazil and Uruguay in the Paraguayan War. Wars and conflicts Despite the Spanish American wars of independence and the Brazilian War of Independence, the new nations quickly began to suffer with internal conflicts and wars among themselves. Most of the 1810 borders countries had initially accepted on the uti possidetis iuris principle had by 1848 either been altered by war or were contested. In 1825 the proclamation of independence of Cisplatina led to the Cisplatine War between historical rivals the Empire of Brazil and the United Provinces of the Río de la Plata, Argentina's predecessor. The result was a stalemate, ending with the British government arranging for the independence of Uruguay. Soon after, another Brazilian province proclaimed its independence leading to the Ragamuffin War which Brazil won. Between 1836 and 1839 the War of the Confederation broke out between the short-lived Peru-Bolivian Confederation and Chile, with the support of the Argentine Confederation. The war was fought mostly in the actual territory of Peru and ended with a Confederate defeat and the dissolution of the Confederacy and annexation of many territories by Argentina. Meanwhile, the Argentine Civil Wars plagued Argentina since its independence. The conflict was mainly between those who defended the centralization of power in Buenos Aires and those who defended a confederation. During this period it can be said that "there were two Argentines": the Argentine Confederation and