SCA jargon for the fighting field.
In the middle ages, the more correct term would have been "Lists" or "Lists Field".
The Known World Handbook notes "They marked their fields with a long strip of red cloth, affectionately named Eric the Red, and the word lived after the cloth faded and died. (They had a white marker and a yellow one too, known as the White Russian and the Yellow Peril...)"
(Known World Handbook, 3rd ed., p.12)