Dartmouth was a home of the Royal Navy from the reign of Edward III and was twice surprised and sacked during the Hundred Years' War, after which the mouth of the estuary was closed every night with a great chain.
Dartmouth je bio dom Kraljevske mornarice od vladavine Edvarda III. i dva puta je bio iznenada napadnut i opljačkan tijekom Stogodišnjeg rata, nakon čega je ušće zatvarano svake noći s velikim lancima.