The testimony of the witnesses regarding forced labor at the complex were essentially descriptions of working and living conditions during the construction phase of the camp during winter of 1943/1944. This phase, also known as the Hell of Dora, was marked by exhausting work in digging tunnels into the Kohnstein Mountain to create a subterranean V-weapons () rocket factory. Statements referring to the subsequent functioning of the Mittelwerk Assembly Plant formed a second priority in this context. Executions of camp prisoners due to alleged rebellion and sabotage were also portrayed.