Yeah, with like a billion years between them. Or something like that.

World Corp War ended the world, and is mostly mythological.

Corpo-Foss war happened 80 years before Girl became the student of Fish.

The three Mata brothers left the bunker, made the first bot and reclaimed the destroyed world somewhere between the two wars. In Grendel it's somewhat implied there is a gap of at least 200 years between Three brothers and Girl. But who knows what's even canon.