Erú, as well Arua, Arwä, Arua, Eruw or Erwu, officially the Goffy Republic of Erú (Repu'blica goffyana e' Erú) is a modern Aiers country in western South Ushaenor. It is bordered in the north by Licuador and Gofondria, in the east by Gofondria as well and Humaid and to the south by Soldarmia and the west by the Ambras Ocean. Erú is an extremely biodiverse country with habitats ranging from the arid plains of the Ambras coastal region in the west to the peaks of the mountains vertically extending from the north to the southeast of the country to the tropical Great Marraos Basin rainforest in the east with the Marraos river.

Before the Apparition of humanity, Eruano territory was part of the Hake Empire until the Elf wars, when the High Elves of the Whide Axis expelled the dark elves to the south: while they attempted to settle in the region, the hit-and-run continuation of the wars and the guerrillas made by the Dark Elves, and as well the presence of some hostile beast-peoples, made the High Elves decide to desert the region:

to avoid it to be re-occupied by the Dark Elves, and with the arrival of humans to Ushaenor around the VI-VII centuries since the apparition of humanity, the Empire of Whide Axis granted the region of Arwä to the Lataverican humans peoples, hoping to both use the humans as a pillow state between their realms and the ones of the Hake Dark Elves, and to keep far away the humans.

Arwä -becoming Erwu in the local Lataverican languages- will come to be home to ancient Lataverican human cultures, divided in several realms and city states before the rise of the Aruan Empire, the largest pre-cataclysm Lataverican and Ushaverican human empire in Ushaenor: while originally the Auran Emperor recogniced the rule of the Emperor of the Elves of the Empire of Whide Axis, as the High Elven Empire weakened, striken in the north by the growing Ne'Sargonic presence, the Aruan Emperors will come to be de-facto independent and no longer accepted High Elven rule.

By the Third War of the Power, the Auran Empire will come to be a battlefield as the Hake entered into the Dark Legion, being as well southern Ushaenor a front in the war, and it will collapse with The Cataclysm.

With the Collapse of the Aruan Empire, the region will be fragmented and will rise new Lataverican powers: namely, Soldarmia and Sao Azil, who will fight for Hegemony in the Early Modern Age for Southern Ushaenor, becoming a contested region.

Being a colonial possetion of JPM in Ushaenor until the Anglasecuarnian Wars, it will be annexed to Soldarmia, being granted independence only as a result of the GOFFY guerrillas rise in Gofondria: Soldarmia, to avoid the Gofondrian rebellion to extend into their territory, decided to grant independence to Erú at the 3234 a.a.H.

After achieving independence, the country remained in recession and kept a low military profile until an economic rise based on the extraction of raw and maritime materials struck the country, which ended shortly before the Tris-Tigris-Hidraulic War. Subsequently, the country has undergone changes in government from oligarchic to democratic systems, until a GOFFY revolution instaured a GOFFY Republic. Erú has gone through periods of political unrest and internal conflict as well as periods of stability and economic upswing.

Erú is a representative GOFFY democratic republic divided into 25 regions. Its main economic activities include mining, manufacturing, agriculture and fishing.

The Eruana population, is multiethnic, with a base of population of Lataverican humans, with a signficiative non-human population. The main spoken language is Aspaniol, although a significant number of Eruanos speak other languages. This mixture of cultural traditions has resulted in a wide diversity of expressions in fields such as art, cuisine, literature, and music.

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