What the Coronado and Oñate expeditions showed was that the Wichita people of the 16th century were numerous and widespread. They were not, however, a single tribe at this time but rather a group of several related tribes speaking a common language. The dispersed nature of their villages probably indicated that they were not seriously threatened by attack by enemies, although that would change as they would soon be squeezed between the Apache on the West and the powerful Osage on the East. European diseases would also probably be responsible for a large decline in the Wichita population in the 17th century.