In 1835 Sonora re-established its bounties for scalps. Chihuahua and Durango followed, but by the 1840s, Comanche war parties were ranging all over northern Mexico, some staying for as long as three months. Comanche war parties usually found easy victims in Texas, and when Americans began to settle there after 1821, Comanches did not distinguish between Anglo and Hispanic settlers. In 1833, Sam Houston arrived in Texas as a United States representative to arrange a treaty with the Texas Comanches. There were some meetings, but Mexican officials began to wonder what he was doing in their country arranging a treaty with their Comanches, and he was asked to leave. Soon after Texas won its independence from Mexico in 1836, Houston became president of the new republic.