During the last years of Spanish rule, Texas was in chaos. The Hidalgo Revolt (1810) was followed by an attempt by American and Mexican adventurers to seize Texas (1812–13). American traders along the Red and Arkansas Rivers were trading guns to Comanches for horses, and this new market increased the tempo of Comanche raids in Texas. A Comanche chief, El Sordo, split from his own people in 1810 and gathered a combination of Comanches and Wichita to raid Texas and Mexico for horses. He was arrested during a visit to Béxar in 1811 and imprisoned in Coahuila. A large Comanche war party went to Béxar to demand an explanation, only to be confronted by 600 Spanish soldiers. There was no battle, but relations between Texas and the Comanches were never the same.