Inside their numbers kept growing
Not stopping at borders, always invading
Focused on only two things
Enabling the creation of more invaders and
Capturing the resources to continue the previously mentioned creation
Thousands becomes millions become billions
Igniting a resistance focused on scorched earth tactics.
Obliterating all foreigners, hurting the natives, stopping the advance
Natural order reestablished, the white cell count and fever reduce back to normal
Image: upload.wikimedia.org/wikipedia/commons/0/06/1900_Blood_cells.jpg