German subs warfare 'brought US into WW1'published at 09:34 Greenwich Mean Time 1 February 2017
Chris Quevatre
BBC News Online
Never-seen-before pictures have emerged of wrecked World War One Germans subs off the Cornish coastline - but it was the battle against the German U-boats that brought America into the war say experts.
Roger Bowdler, from Historic England, said using U-boats was "a decisive moment" in World War One.
He said: "It was seen as uncivilised, ungentlemanly and ultimately brought the might of the United States into the war."