The Suessetani were a pre-Roman people of the northeast Iberian Peninsula that dwelt mainly in the plains area of the Alba (Arba) river basin (a northern tributary of the Ebro river), in today's Cinco Villas, Aragon, Zaragoza Province (westernmost Aragon region) and Bardenas Reales area (southernmost Navarra region), west of the Gallicus river (today's Gállego river), east of the low course of the Aragon river and north of the Iberus (Ebro) river, in the valley plains of this same river. Their location, in relation to other tribes, was south of the Iacetani (Aquitanian tribe), west of the Vescetani or Oscenses (Iberian tribe) north of the Lusones and Pellendones (Celtiberian tribes), also north of the Sedetani (Iberian tribe), and southeast of the Vascones (Aquitanian tribe or people). Corbio was the capital of the Suessetani and an important fortified city, yet unlocated (maybe between Sangüesa and Sos del Rey Católico). Ethnic and linguistic affiliation There is yet no definitive conclusion about their ethnic affiliation. They could have been an Iberian or an Aquitanian tribe, but because of their ethnic name, and place and river names (toponyms and hydronyms), the indo-European, pre-Celtic indo-European and Celtic affiliation possibility is more likely. They may have been a Celtic tribe (Belgic), related to the Suessiones that dwelt in Gallia Belgica, northern Gallia (Gaul) in today's Soissons area. Suessiones tribe, that dwelt in the Marne river territory, had a city called Corbio (today's Corbeil), like the Suessetani. So there is an association between the root words suess- and corb- in these two tribes (Corbeil comes from the galo-Celtic Corbio ialo – Corbius field). It is not known when did they arrived in the region that they dwelt but some estimate that they arrived around 600 BCE, or maybe earlier, along with a belgic Celtic migration. The place names (toponyms) and river names (hydronyms) of their territory are clearly indo-European, probably Celtic or pre-Celtic indo-European. The place names are for example: Corbio, Viridunum (Berdún), Gordunum (Gordún), Navardunum (Navardún), Sekia/Segia, Setia, Gallicum, Forum Gallorum. The river names are Alba (today's Arba river), Gallicus river (Gállego). This seems to indicate that they spoke an indo-European language, maybe a Celtic one. Roman conquest Titus Livius wrote about Marcus Porcius Cato's campaigns in Hispania. In his work he reports that the Suessetani were enemies of the Iacetani, because, on other things, Iacetani sacked the fields and crops of the Suessetani. Marcus Porcius