I rule the midnight air, the destroyer, die by my hand, I am Creeping Death.
Posted by: Puma Knight
The Halos were a last resort. They tried looking for a different way to beat them before firing the rings.
On another not, the threat did rise again. It would have been good to know a cure if the Flood ever came back, which they did.
Posted by: Death7452
Posted by: Sniffy66
The flood was kept alive in research facilities so they could be studied to try to find a cure for it like what Ancient Humanity did. The Universe was repopulated because the forerunners never thought a race would be stupid enough to release it so they considered it safe.
Why would they need to find a cure for a threat that would never arise again?
So that means they were wiped out eventually, and came back from outside the galaxy again, which I do not remember at all hearing.
Not really important, just curious about this.