The third conflict between humanity and the Kzinti.
According to the Known Space novel Juggler of Worlds, the conflict started in 2490 and lasted an unknown amount of time. At the end of the war, the Wunderland Treatymaker weapon was used on the Kzinti fortress-world of Warhead, creating a huge, habitable canyon on the otherwise Mars-like world. Afterwards Warhead was annexed by the humans and renamed Canyon.
- ↑ Larry Niven - Juggler of Worlds