Fort Castle

Fort Castle is a location in Vytal and an important battleground at the climax of The Faunus War.

Location
While not specifically revealed, it can be assumed that it was in the Menagerie region where the war was based.

The Battle at Fort Castle.
The battle for which the location was named occured when a Human general by the name of Lagune sent his army to take the Fort at night, in theory taking the enemy by suprise. However the Faunus he was facing had, like all Faunus, the ability of night vision and was able to defeat the much larger army. The battle was seen as a turning point in the war for the Faunus.