The book "An Introduction to the Viking History of Western Europe, Viking Antiquities in Great Britain and Ireland" (1940) by Haakon Shetelig, presented the theory that Louis was laying the groundwork for a "military invasion and occupation of Denmark".
Harald V of Norway | Harald Eia | Harald Hudak | Harald Bohr | Harald Schumacher | Harald Meier | Harald I | Harald Kloser | Harald Bluetooth | Harald Zwart | Harald Stormoen | Harald Penrose | Harald Moltke | Harald Helfgott | Harald Berg | Kľak | Heinz-Harald Frentzen | Harald Welte | Harald Vogel | Harald Victor Hove | Harald Szeemann | Harald Schmid | Harald Prokop | Harald Nielsen | Harald Motzki | Harald Martenstein | Harald Hennum | Harald Haarmann | Harald Edelstam | Harald |
Harald Klak a co-king of Denmark was forced from Denmark by his co-king, Horik I and fled to Germany to get help from Emperor Louis.