Whakakiia te rerenga e whai ake nei: "Ko Mars" i whakahaerehia e te Neptun Line. Tekau mā waru ōna kaimahi, ā, kotahi tekau mā rua ngā pāhihi i noho ai. I tonoa ia i te tau 1940 e te Kriegsmarine, engari i whakahokia ki Neptun Line i muri mai i taua tau. I tonoa ano ia i te tau 1942. ka hurihia hei kaipuke hohipera mo te whakamahi hoia. I te 13 o Tihema 1943, i tino pakaru te Mars i te whakaekenga rererangi ki Bremen na te United States Eighth Air Force. I āwhina ia i te
te tangohanga o ngā tāngata Tiamana mai i Königsberg me Pillau. I waenga i te Hanuere me te Paenga-whawha 1945, i kawea e ia nga tangata 20,000. Ko te "Mars" pea te kaipuke nui whakamutunga i wehe atu i Pillau ki Copenhagen.