The first surprise is the role of Spain in the revolutionary war. In Paris in December 1776, Benjamin Franklin met in secret with the Count of Aranda, quickly convincing him Spain needed to side with the Americans. Ships leaving New England already called at Spanish ports such as Bilbao and Cádiz to purchase cod and flour.
Why would people just off the Grand Banks come to Spain to purchase cod?
I don’t know if they did or not but it does seem to be an odd thing to be doing.