The Spanish Civil War at Sea

The Spanish Civil War of 1936-1939 underlined the importance of the sea as the supply route to both General Franco's insurgents and the Spanish Republic. There were attempted blockades by Franco as well as attacks by his Italian and German allies against legitimate neutral, largely British, merchant shipping bound for Spanish Republican ports and challenges to the Royal Navy, which was obliged to maintain a heavy presence in the area. The conflict provoked splits in British public opinion. Event