Who led an expedition on to the great plains in 1720 to search for french traders?

In 1720, an expedition to the Great Plains was led by Spanish explorer Juan de Ugarte. He was tasked with searching for French traders who were encroaching on Spanish territory. Ugarte's mission aimed to assert Spanish claims in the region and to establish contact with Native American tribes. His efforts were part of the broader tensions between Spanish and French colonial interests in North America during that period.