Who was the leader of the last major Spanish expedition into Oklahoma?

The leader of the last major Spanish expedition into Oklahoma was not Onate; it was actually Mendoza. His expedition in the late 16th century was significant because it attempted to explore and claim parts of what is now America, including areas of Oklahoma. Spanish expeditions often aimed to find new territories and to establish missions in Native American lands, and Mendoza's journey reflects these broader objectives of Spanish exploration during that period.

Onate is known for his earlier explorations and colonization efforts but did not lead the last significant expedition into Oklahoma. DeSoto is recognized for his expeditions in the southeast of North America. Coronado's explorations primarily focused further west, in present-day New Mexico and Kansas, rather than Oklahoma. Understanding the contributions and timelines of these explorers helps contextualize the history of Spanish exploration in Oklahoma.