 Complete the following phrase:  Fort Concho was established during the American colonization of Texas in the 19th century. Europeans had first reached the Concho River valley in the 16th century. The Spanish established contact and then trade with the Jumano people, who were driven out of the valley in the 1690s by the Apache peoples. The Apache were themselves expelled by the mid-18th century by the Comanche. However, in 1849, American colonists began crossing West Texas in large numbers to reach California, where 