After acquiring the lands of the Louisiana Purchase in 1804, Jefferson commissioned military groups to explore the unfamiliar territory and to collect scientific data about flora and fauna, topography, and ethnography of the many Native American peoples. By sending a group of explorers up the Red River, Jefferson wanted to verify reports that the river could provide a water route to Santa Fe in New Mexico (then part of New Spain). Other goals were to build trade and political relationships with the various tribes of American Indians, and to locate the Louisiana Purchase's southwestern and western borders with New Spain.