The British tax on this resource inspired a 1930 march to the sea led by Gandhi in order to acquire it.
English towns ending in the suffix "wich" were known for producing this resource. A medieval road that brought this resource from Lüneburg to Lübeck was a major source of the power of the Hanseatic League. The French Revolution abolished the unpopular centuries-long gabelle tax on this resource. The British tax on this resource inspired a 1930 march to the sea led by Gandhi in order to acquire it. For 10 points, name this resource that was vital for preserving meat before refrigeration, which caused it to be nicknamed "white gold."
English towns ending in the suffix "wich" were known for producing this resource.
{salt}