party, and their opponents, such as the supporters of Ferré and Virasoro, would become the autonomist party. In December 1843, both brothers invaded Entre Ríos, taking advantage that Urquiza was in Uruguay pursuing Rivera. The Entrerrianan reserve of Eugenio Garzón was defeated, but upon arriving at Concepción del Uruguay they learned that Urquiza had defeated Rivera and was returning. The retreat that followed transformed into a flight and they lost all they had gained. Just after returning to Corrientes, it confiscated a Paraguayan shipment that sailed through the Parana River. The government of Carlos Antonio López was about to declare war but Santiago Derqui was able to negotiate a peace treaty, a navigation and commerce treaty and a little later an alliance against the Rosas. In November 1844 General Paz arrived at Corrientes, and immediately, Madariaga put him in control of the provincial forces. The General dedicated many months to training the inexperienced troops. In June 1845 he sent an expedition to Santa Fe under former Governor Juan Pablo López's command, though without success. At the beginning of the following year, a force of 3,000 Paraguayans was established under the control of the son of the current president and future president Francisco Solano López. A little later, Urquiza invaded Corrientes and both defeated and took Juan Madariaga prisoner at Laguna Limpia. He did not try to attack the defensive positions of Paz but rather turned back. He promptly set free the brother of the governor and signed a peace treaty. General Paz decided to overthrow the Madariaga brothers. To his surprise, the troops remained loyal and he had to flee to Paraguay. President Lopez retired his army and cancelled the alliance. Potrero de Vences Free from the arrogance of Paz, the negotiations advanced rapidly, and in August 1846 the Treaty of Alcaraz was signed. Through this Corrientes was reincorporated in the Confederation and the control of foreign relations was given back to Rosas; however, Corrientes was released from the obligation to support the Great War in Uruguay. Rosas demanded modifications to the treaty but they were rejected by Madariaga. In March of the following year, Rosas ordered Urquiza to attack Madariaga in Corrientes. Colonel Virasora joined the forces with Urquiza in the invasion that began by the end of that year. On November 27, 1847, Urquiza shredded the Corrientian army controlled by the Madriaga brothers in the Battle of Vences