WesermÃ 1\/4 nde and Bremerhaven were unified in the year 1939 to WesermÃ 1\/4 nde . All of WesermÃ 1\/4 nde , including those parts , which prior did not belong to Bremerhaven , was a postwar enclave run by the United States within the British zone of northern Germany . In 1947 the city became part of the Bundesland Bremen ( Bremen Federal State ) and was consequently renamed from WesermÃ 1\/4 nde to Bremerhaven .