is the 19th book in the Redwall children's fantasy novel series by author Brian Jacques and illustrated by David Elliot.

"Eulalia" ("Victory") is also the war cry used by the fighting hares and badgers in the Redwall series.

In the far, cold Northern Isles, the red fox captain Vizka Longtooth and his Sea Raiders plunder a lonely farmhouse where the young Eurasian badger Gorath and his grandparents live.

Vizka knocks Gorath unconscious with his chain and mace and puts him on board his ship, the Bludgullet.

He sends a young European brown hare, "Mad" Maudie, to search for the badger.

At the same time, a young European hedgehog called Orkwil Prink is expelled from Redwall Abbey due to thieving.

He agrees to lead her to the Guosim common shrews who will take her to Redwall, where Lord Asheye ordered her to go.

Gorath and Orkwil have made it to Redwall and have warned Abbot Daucus and Skipper Rorc of the approaching Sea Raiders.

Vizka had captured a mean vole and ordered him to disguise himself to gain entrance to Redwall, which he wants to conquer.

However, just as they were leaving, the vole kills a Sister of Redwall, steals the Sword of Martin the Warrior and runs off.

Gorath, who is in the grip of a berserk rage, sweeps in on a horde of Brownrats, killing dozens.

In the process of sneaking up to it, at some point they lose Orkwil; Maudie and Rangval make it to Gorath's force, however.