There were five guilds in total in South Korea, and those five guilds were the Legion Guild, The Black Knight Guild, The Warlord Guild, The Shade Guild, and The Giant Guild. From the five guilds, The Legion Guild was the strongest with their five Epic Ranks, while the other four guilds only had seven Epic Rank combined. The five guilds had a harmonious relationship until the World Congress when the other four guilds decided to join the World Government, and the Legion Guild remained independent.
The reason why the Legion Guild remained independent was that South Korea's government backed up the Legion Guild. The main reason why the Legion Guild grew faster than the other four guilds was that Tae Bong was Seoul's former mayor. The police force in Seoul followed Tae Bong and joined the Legion Guild, strengthening the guild's power. It was also the main reason why the survivors chose the Legion Guild instead of the other four guilds.