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Runeterra is the world in which the continent of Valoran exists and where the League of Legends (Institute of war) is located. The League of Legends is an organization which was created to resolve the political conflicts in Valoran. ^[1] Twenty years ago from its present state, Runeterra was on the verge of disaster. Fighting broke out all around Valoran and other continents. Regardless of the era magical warfare has always been preferred. Runeterra holds a large quantity of raw magical power and so wars between tribes were too becoming too destructive. Within the last two hundred years the dangers of unchecked magical warfare began to expose the fragility of Runeterra and it soon became apparent to everyone residing in Valoran. The geophysical landscape of Valoran began to drastically change as a result of the last two Rune Wars - despite the use of magical energy to try and restore it. The violent earthquakes and intense magically-fueled storms that followed made life on Valoran more difficult, even before taking into account the horrific battles that were going on. ^{[2] [3]} Before a third Rune War could ensue and cause more damage - key magicians from all around Valoran, as well as many powerful summoners drew the conclusion that a new way of resolving conflicts needed to be found. As a direct response to the world's growing physical and political instability they decided to form an organization called the League of Legends, whose purpose was to oversee the resolution of political conflict in a controllable and systematic way. This organization is housed in the Institute of war located in the center of Valoran. There politcal disputes are settled in controlled areas called "Fields of Justice" the most popular of these maps being Summoner's Rift. ^{[4] [5]}

Runeterra has several “league city states” –cities that the league of legends have deemed to have a substantial impact on runeterra-. These states are: Bandle City, Bilgewater, Demacia,Freijlord,Ionia, Noxus, Piltover and Zaun.

Demacia is a state awash with white stone and marble buildings and is seen to be the most virtuous human settlement in Valoran. The people their live strictly with good morals and a thirst for justice: anyone opposing these often finding themselves isolated or worse. The state is run by a constitutional monarchy with the royal Lightshield family. Demacia was one of the first cities to endorse the league of legends and with the biggest army in Valoran it joined with the intention of diminishing the threat of Noxus, another city league state that Demacia have a long and bitter feud with. The league allows Demacia the vast resources needed to keep its colossal army and the reason the army itself changed its target to re gain things Noxus has taken to an all out defensive army of protecting the state itself. Iconic figures affiliated with Demacia are: Fiora, Galio, Garen, Jarvan IV, Lucian, Lux, Poppy, Quinn, Shyvana, Sona, Vayne and Xin Zhao.

Piltover (the city of progress) is a city that specializes in the ecologically friendly research of techmaturgy: powering itself from the gases and liquids in a marsh atop a small mountain. The city finds itself ever expanding on the parts of science researched there both by residents and visitors featuring aspects such as archaeology and medicine. Piltover is also known as the city of progress due to its remarkably low crime rate. The citizens strongly believe that the city would have fallen to a much more sinister fate if it were not for Caitlyn – sheriff of piltover- with her somewhat prodigal skills of investigation and impressive skill in marksmanship. Of course there are still various thieves and groups such as Jinx who plague the city. Iconic figures affiliated with Piltover are: Caitlyn, Corki, Ezreal, Heimerdinger, Jayce, Orianna and Ziggs.