The S.S. Jeremiah O'Brien is one of only two surviving operational Liberty ships of 2710 ships of this class that were built. Liberty ships, along with similar Canadian and British ships, were the mainstay of the Allied logistic effort during W.W.II. Without the military and civilian cargos delivered by these ships, victory would not have been achieved. A national treasure, the O'Brien serves as a living memorial to the men and women who built, supplied, and sailed Liberty ships.