Play it by Ear: the Thin Line between Privateering and Piracy in the Atlantic Ports (c. 1200-1500)

This paper examines the legal, economic, and operational distinctions between privateering and piracy within Atlantic ports during the European Middle Ages (c. 1200-1500). Drawing on admiralty court records, letters of marque, and chronicle evidence, it argues that while both practices involved maritime predation, privateering functioned as a state-sanctioned mechanism for extending naval power and resolving trade disputes, whereas piracy represented unsanctioned banditry. Crucially, the distinction often hinged on port-authority complicity, the validity of commissions, and adherence to emerging prize law. The paper reveals how Atlantic ports served as critical nexuses where legal frameworks, economic interests, and informal networks blurred these categories, facilitating both crown-sponsored enterprise and illicit predation. This ambiguity ultimately shaped early modern state formation and international maritime law.