Caprillan-Scarlofen war
From Tardis Wiki, the free Doctor Who reference
The Caprillan-Scarlofen war was fought between the Caprillans and the Scarlofens. Circa 5614, Iris Wildthyme aided in the settlement negotiations that brought an end to the conflict and helped to usher in a thousand years of peace between the two alien nations. (PROSE: Iris at the V&A)
