The US in world war 3 was hit with 3 high-level toxic bombs that split the US into 5 cities, each city inhabited powers from the blast, Embers Blaze, Juncture land, Segmental City, Folk Land, and Homosapians. To keep the peace the cities are connected with bedrock bridges that hold monuments of the city, and each city has chosen its leader.
:D have fun reading
and leave me som feedback so I can make this as unique as posible