Starship Trooper Bugs vs Real Earth
The population of current earth as well as resources, weapons have been condensed into the the continent of Asia and Europe.
500 million bugs, from Starship Troopers, a mix of the types, are occupying Africa - this includes 5 brain bugs that humanity is aware of but don't know the exact location.
The continents are separated by a magical forcefield, which will disappear on an exact date and time in six months. Other continents are unpopulated. Antarctica is the only continent the bugs won't venture to or attack.
What happens? Which species survives?