2 Works in Paper Legends 2011
Reincarnation story set in 1940. In Albion's hour of need Arthur is brought back from his rest in Avalon. He learns that the world is at war, and that the enemies have dark magic at their disposal. With the help of the mysterious Vril society the invaders are about to gain air superiority and become unstoppable. Only Merlin could fight the new magical threat, but Merlin has been missing for a long time.
Summary: Arthur has come to the throne. He needs to establish himself and demonstrate his difference from his father. Too soon, a murder changes everything and Arthur has to go to war.
Goes AU some time after The Tears of Uther Pendragon, but before the last episodes of the third series, since Cenred is still King of Escetia and Lancelot is not in Camelot.
Warnings: Mention of the rape and murder of a female OC (who would be under-age in the 21st Century), description (but not depiction) of medieval justice/punishment, minor character death in battle.