At the time Vikings more than annually ravaged not only the Frankish coastlands but, with the aid of Europe's numerous navigable rivers, much of the interior also.
The purpose and primary effect of the Edict was long thought to be the protection of the cities and countryside from Viking raids.
To prevent the Vikings from even attaining a great booty, Charles also declared that fortified bridges should be built at all towns on rivers.
Simon Coupland believes that only two bridges, at Pont-de-l'Arche (near Pîtres) on the Seine and at Les Ponts-de-Cé on the Loire, were ever fortified, though a few others that had fallen into disrepair were rebuilt "in times of crisis in order to increase troop mobility".
Economically, besides the prohibitions on commerce with the enemy, Charles tightened his control of the mints and regulated the punishment for counterfeiting.