What Came to Be Panem
Prologue:
The desperation for power was growing each and every day. A nuclear world war had started and countries started to form big nations. These nations were divided into: North America; South and Central America; Europe and Russia; Asia (with the exception of Russia); Africa and the Middle East; Australia and New Zealand. People were recommended to stay in deep underground shelters that were built long ago but the government never advertised their existence. But the problem was that there wasn't enough space for everyone. The goal of every nation was to keep families that could perform vital functions in these shelters, so that the future of the nation wouldn't be condemned.
With the war, the face of the world changed. From the approximate 7.5 billion people that lived out and about mother Earth, 3 billion survived after 2 years of war. There was no plenty of land. The continents had 2/3 of their land submerged; and millions of bodies were found on land or floating and taken by the ocean. The nations finally came into an agreement to produce and live according to their own isolated conditions and to ignore other nations. From that day on, only the presidents would have access to global internet, which could only be used in case of a national emergency and would need to join other nations. Every nation had to start again from zero.
This is the story of what was left of North America.