sentences:  Antonio López de Santa Anna, the ruler of Mexico, was defeated by Texians at the Battle of San Jacinto and signed the Treaties of Velasco in 1836, ceding Texas territory from Mexican control (these treaties had not been ratified by the Mexican legislature).But, his forces continued to invade the Republic of Texas with the goal of regaining control, particularly of the territory between the Rio Grande and Nueces River.Texas had hardly any settlements there.