AGUAYO EXPEDITION. The Aguayo expedition, a project of the Marqués de Aguayo, resulted from the French invasion of 1719, which caused the Spanish to retreat from East Texas. In response to Aguayo's offer, the viceroy commissioned him to reoccupy the area. Aguayo gathered together a force of about 500 men, organized as a mounted infantry, which he called the Battalion of San Miguel de Aragón. Four thousand horses and other livestock provided transportation and provisions. Juan Rodríguez actedas guide.