From A Wiki of Ice and Fire
The Redgrass Field is the site of the Battle of the Redgrass Field. It was an unnamed field before the battle. It was renamed the Redgrass Field after the battle for the color grass had been stained by the blood.
While its exact location has not yet been confirmed, the Redgrass Field is known to be located somewhere near King's Landing.
- ↑ The Sworn Sword.
- ↑ Reddit: Where is the Redgrass Field?