From the back of the box:
A comical card game of nuclear confrontation involving nervous world powers and jittery diplomats. Everyone jockeys for domination (in self defense, of course), using propaganda, espionage, and meanwhile building space platforms (for peaceful purposes, of course). Diplomacy inevitably fails and the missiles start flying!
The first expansion set for Nuclear War, this can also be played on its own.
This is a tuck box for the Nuclear Escalation Population cards.
The version of the game I have is from a very long time ago. I do not know if the card sizes have changed at all over the years.
If newer versions of the game do have different card sizes, please contact me and I will be happy to work with you to create tuck boxes of the appropriate size.