This group collect stories where Nightmare Moon won. Doesn't mater if it was a thousand years ago, after she escaped from the moon or in some other way.

Folders
1000 year of night – here goes stories where Nightmare Moon won against her sister in the original conflict.

A new twilight – stories about Nightmare Moon’s reign after she returned from her imprisonment and subsequent victory over her sister.

Other Nightmares – stories where the Nightmare who conquered Equestria was somebody else then Luna.

Main – here goes any story that doesn’t fit in the other folders or is unsorted for now.