After the German invasion of
Poland, Kotalla was called up for German
military service. He was assigned to the
SS and was wounded on the eastern front. When he had recovered, he left for the Netherlands in 1941. Kotalla came to work at the
cell barracks of the Scheveningen prison. At that time he met his first wife, a woman from the German city of
Kleve, whom he married in 1941. At the time of marriage she was 17 years old. In September 1942 he was appointed by
Schutzhaftlagerführer II Karl Peter Berg in Kamp Amersfoort. He entered service there as a camp SS soldier and became head of the
Schreibstube, the administration. He started his duties at
Abteiling III (Section 3). Even after his appointment in Amersfoort, Kotalla was treated psychiatrically. From December 1942 to about April 1943 he was nursed in the psychiatric ward of a German military hospital. After his return from the hospital in Kamp Amersfoort he was called "
UnterSchutzhaftlagerführer", in which position he replaced Berg as commander in his absence. As
SS-Oberscharführer he was seconded to the
Sicherheitsdienst of the camp. According to Kotalla, he continued to work in Kamp Amersfoort until 20 April 1945. Although he was still married, he had several mistresses in the camp. In 1944, Kotalla started a relationship with 21-year-old Louisa Johanna (Loes) van den Bogert, a Dutch typist who worked at
Abteilung III of the camp. Kotalla was described as the most notorious camp executioner of Kamp Amersfoort and was nicknamed
The Executioner of Amersfoort. He had a short temper, took
pervitine, drank liters of
gin and mainly targeted
Jews and
priests. Kotalla was known, among other things, for his brutality during the daily roll call, kicking and hitting prisoners with a club. In one case, as a punishment exercise, he had prisoners lie on their backs and then stamped his boots over them. He delighted to give the prisoners only five minutes to finish their hot meal. In at least one instance, he let his shepherd dog loose on a prisoner. He also kicked between the prisoners' legs; in the camp this was called the 'Kotalla kick'. Kotalla took part in a
firing squad several times. == Trial and conviction ==