Early Spanish explorers encountered a number of ethnically distinct bands of aboriginal peoples near the Medina River who spoke a common
Coahuiltecan dialect. The largest of these groups were the Payaya, known to the Spanish since 1690 and considered quite friendly. The area under their influence was centered along the lower
Frio River's confluence with the Nueces (in an area later called
Nueva Extremadura in
New Spain). The Pastia lands overlapped largely with the Pampopa tribal lands. Their homeland was well removed from the usual northern Spanish trade routes and trails leading into
Tejas. For that reason, the Pastia and Spanish had no contact until the early eighteenth century. When the
Espinosa-
Olivares-
Aguirre expedition—Spain's initial excursion to explore the area of the San Antonio River valley—crossed the Medina on April 24, 1709, they encountered the Pastia tribe for the first time. ==The people==