[1] Stoltzenberg was a close collaborator of Nobel Prize laureate Fritz Haber, the father of German chemical warfare.
[2]: 163–166 They both collaborated in the disposal of chemical warfare materials and the building of manufacturing plants in La Marañosa, near Madrid, Spain, the Soviet Union and Germany.
[4] Stoltzenberg was the main protagonist at the Second Battle of Ypres (22 April to 25 May 1915) in Belgium where the Germans used poison gas for the first time on the Western Front.
[6] After the end of World War I, Stoltzenberg participated in clearing away the stockpiles of the chemical warfare agents in Lüneburg Heath in Lower Saxony, Germany between 1920 and 1925.
He signed a contract to fully assist the establishment of the La Marañosa plant "Fábrica Nacional de Productos Químicos" (National factory of chemical products) which served the Spanish army with chemical warfare agents (including mustard gas bombs) used against the Riffian rebels in Spanish Morocco during the Third Rif War between 1923 and 1927.