BTW, here are the basics of WWIII/The Eugenics Wars, based upon what Spock & the other Enterprise crewmen tell us in "Space Seed" (I copied this from my personal TOS chronology, so it's directly derived from the episode's dialogue):
1992
Khan Noonien Singh is absolute ruler of more than a quarter of Earth, from Asia to the Middle East. There are no massacres or wars under his rule.
1993
A group of genetically enhanced supermen seize power simultaneously in over 40 nations.
1996
The Eugenics Wars end when the last of the tyrants is overthrown.
Khan goes into space with 83 of his followers on the DY-100 class sleeper ship SS Botany Bay. The fact that 80 or 90 supermen are still unaccounted for is kept secret from the general populace of Earth.
1992
Khan Noonien Singh is absolute ruler of more than a quarter of Earth, from Asia to the Middle East. There are no massacres or wars under his rule.
1993
A group of genetically enhanced supermen seize power simultaneously in over 40 nations.
1996
The Eugenics Wars end when the last of the tyrants is overthrown.
Khan goes into space with 83 of his followers on the DY-100 class sleeper ship SS Botany Bay. The fact that 80 or 90 supermen are still unaccounted for is kept secret from the general populace of Earth.