Original sentence: Beginning in the 1930s and up until the end of the Second World War, Korean conscripted civilians and Chinese prisoners-of-war were forced to work under very harsh conditions and brutal treatment at the Mitsubishi facility as slave laborers under Japanese wartime mobilization policies
Edited sentence: Beginning in the 1930s and up until the end of the Second World War, Korean conscripted civilians and Chinese prisoners-of-war were forced to work under very harsh conditions and brutal treatment at the Mitsubishi facility as forced laborers under Japanese wartime mobilization policies