Why did texas leaders and comanches meet in early 1840? what happened as a result of this meeting

A peace policy that utilized trade and gifts to promote friendship and authorized military force only to punish specific acts of aggression was inaugurated and remained in effect, with varying degrees of success, for the remainder of Spanish rule in Texas. The first success of the new Spanish policy came in 1762, when Fray José Calahorra y Saenz negotiated a treaty with the Comanches, who agreed not to make war on missionized Apaches. Continued Apache aggression made it impossible for the Comanches to keep their promise, and ultimately led Spanish officials to advocate a Spanish-Comanche alliance aimed at exterminating the Apaches. That policy was officially implemented in 1772, and with the help of Athanase de Mézières, a French trader serving as Spanish diplomat, a second treaty was signed with the Comanches. The Comanche chief Povea signed the treaty in 1772 at San Antonio, thereby committing his band to peace with the Spaniards. Other bands, however, continued to raid Spanish settlements. Comanche attacks escalated in the early 1780s, and Spanish officials feared the province of Texas would be lost. To avoid that possibility, the governor of Texas, Domingo Cabello y Robles, was instructed to negotiate peace with the warring Comanches. He dispatched Pedro Vial and Francisco Xavier de Chaves to Comanchería with gifts and proposals for peace. The mission was successful, and the emissaries returned to San Antonio with three principal Comanche chiefs who were authorized by their people to make peace with the Spanish. The result was the Spanish-Comanche Treaty of 1785, a document that Comanches honored, with only minor violations, until the end of the century. As Spanish power waned in the early years of the nineteenth century, officials were unable to supply promised gifts and trade goods, and Comanche aggression once again became commonplace. Comanches raided Spanish settlements for horses to trade to Anglo-American traders entering Texas from the United States. Those Americans furnished the Comanches with trade goods, including arms and ammunition, and provided a thriving market for Comanche horses.