The agreements with the United States and neighboring tribes, as well as the hiatus in the struggle with Texas, freed up the Comanche to make unrestrained war on the Mexican provinces south of the Rio Grande. The 1830s demonstrated that the Texans, the United States, and neighboring tribes all had the ability to invade Comanchería and attack the Comanche homeland; Mexico, by contrast, was rich in horses and unable to counterattack due to distance and the fact that, after 1836, any Mexican military expedition against Comanches would have had to pass through Texas, a republic whose independence Mexico did not recognize. In attacking Mexico, the Comanche seemed motivated by opportunity, economics and revenge – their animosity toward non-Comanches sharpened by decades of war and reprisals. Thus, their raids on Mexico became increasingly bloody and destructive. needed