The American Indians' ancestors were among the first people to set foot in the Americas 30,000 years ago. They have lived in the Sonoron Desert near the Gila River in what is now Southern Arizona for at least 2,000 years. Called the Pima Indians by exploring Spaniards who first encountered them in the 1600s, these early Americans called themselves "O'Odham," the River people, and those with whom they intermarried, "Tohono O'Odham," the Desert people.





