During the final phase of the war, Kochendorf Railway Station became a transit point for concentration camp prisoners as well as machines and construction materials for the arms industry. The first machines from Heinkel-Hirth arrived in August 1944. They were loaded onto a narrow-gauge railway and transported to the shaft on the other side of the tracks. The mine was converted into an underground arms factory. By March 1945, more and more arms companies were sending machines to the mine. The station was also intended to be used for the transport of finished armaments, such as turbines for fighter planes, engines for submarines, gearboxes for tanks, and submachine guns. For this purpose, another narrow-gauge railway led to two new entrances under construction at the mine.
On September 3, 1944, the first concentration camp prisoners disembarked from a train at the station. The transport of 653 prisoners arrived from Thil and Deutsch-Oth (today called Audun-le Tiche) in Lorraine. The SS had evacuated the nearby sub-camps of the Natzweiler concentration camp to escape the advancing US Army. Upon the arrival of the transport in Koblenz, the Natzweiler command decided to send the guards and prisoners to Kochendorf, where a new concentration camp was being built. Most of the prisoners were Hungarian Jews who had been deported to Auschwitz in the spring of 1944. Their families had been gassed, while able-bodied men and women were selected for forced labor. The transport to Kochendorf also included one dead prisoner. The SS employed the prisoners as forced labor in the underground factory.
On October 1, 1944, a second transport arrived: A train from Sachsenhausen brought 700 prisoners of various nationalities to the Kochendorf concentration camp. The largest groups were Soviets, many of whom were prisoners of war, and deportees from France, some of whom were resistance fighters.
Three weeks later, on October 23, the Waffen-SS loaded 92 sick and exhausted Kochendorf prisoners onto a train that took them to the Allach sub-camp of Dachau. Almost all of the prisoners were Hungarian Jews who, after barely two months in Kochendorf, were no longer able to work.
The next transport of prisoners likely arrived on January 3, 1945, from the Flossenbuerg concentration camp. The train, originally bound for Dachau, had been rerouted to Kochendorf for unknown reasons. On January 24, the prisoners were transported back to Flossenbuerg. At least three of the 101 prisoners from various countries did not survive the transport or their time at the camp.
In February 1945, a transport train brought 50 unfit-for-work prisoners to the so-called “death camp” in Vaihingen near Ludwigsburg. The last two prisoner transports reached Kochendorf on March 10. First, a transport with 200 prisoners arrived from Unterriexingen, where there was a sub-camp of the Vaihingen concentration camp. Almost all of the deported were Polish Jews. The SS greeted the prisoners with guard dogs. Presumably on the same day, prisoners from the Mannheim-Sandhofen concentration camp arrived. Most of them were Poles from Warsaw.
By this time, the evacuation of the Kochendorf camp was already imminent. On March 29, 1945, it took place. 398 prisoners, most of them from the camp’s infirmary, were brought to the railway station by farmers with horse-drawn carts. However, the transport was delayed by several hours due to a lack of food. The station master finally decided that the train would depart without provisions. At least 54 prisoners died on the way to Dachau—due to hunger, cold, weakness, and beatings by the guards.