Question: Which four kingdoms did the Great Heathen Army invade?
Sentence (from "Battle of Lüneburg Heath"): The Battle of Lüneburg Heath (also called the Battle of Ebstorf) was a conflict between the army of King Louis III of France and the Norse Great Heathen Army fought on 2 February 880 AD, at Lüneburg Heath in today's Lower Saxony.
Relevant evidence: No