In Encounter Setup for Cyrodiil's Endgame Day 1, when you are told to deploy a level 5: Breton Marauder, you should instead deploy a level 5: Wood Elf Marauder.
The Breton cannot be used because it is on the backside of the level 1: Breton Bandit which is also used in this encounter. The Wood Elf is also what was intended for thematic purposes.