In 851, Æthelstan and Ealdorman Ealhhere defeated a Viking fleet and army off Sandwich, Kent, described by Frank Stenton as "the first naval battle in recorded English history".
En 851, Aethelstan e o mordomo Ealhhere derrotaron unha frota viquinga e un exército en Sandwich, Kent, descrito por Frank Stenton como "a primeira batalla naval rexistrada da historia inglesa".