Chivicura
Chivicura was a fort erected in 1593 by the Royal Governor of Chile , Martín García Oñez de Loyola on the south bank of the Biobío River , to the west of the confluence of the Rele River with the Bio Bio , in what is now the commune of Santa Juana , Chile . 
<triplet> Rele River <subj> Biobío River <obj> mouth of the watercourse