Pedro de Aguirre

Pedro de Aguirre was a Basque Spanish military man and explorer. He led the Espinosa-Olivares-Aguirre expedition in Texas.

Biography Aguirre was born in Arantza, a small town located in the autonomous community of Navarre, Spain, to Pedro de Aguirre and María Sagardia. Aguirre joined the Spanish Navy in his youth and was promoted to captain. Later, he was sent to Coahuila to work at the Presidio de San Juan Bautista del Río Grande del Norte, where he served as a commander.

In 1708 he was elected by a council to lead the expedition of Antonio de Olivares and Isidro de Espinosa to San Antonio, Texas and the Colorado River of Texas.

On April 19, they arrived at the Colorado River, but did not find any Tejas. On April 28, after the failure of their last mission, the group left the region and took the road back to San Juan Bautista.