The use of the term "submarine" or "sub" (after the resemblance of the roll to the shape of a submarine) is widespread.[1] One theory is that it originated in a restaurant in Scollay Square in Boston, Massachusetts at the beginning of World War II. The sandwich was created to entice the large numbers of navy servicemen stationed at the Charlestown Navy Yard. The bread was a smaller, specially baked baguette that resembled the hull of the submarines it was named after.[7]