Otto Carl Robert von Rosen (11 May 1884–26 May 1963) was a Swedish military officer and sport shooter[1] who participated in sabotage attacks during the First World War.
The latter provided him and his associates with explosives and sugar cubes containing tiny glass ampoules holding Bacillus anthracis (the causative agent of anthrax) spores in a liquid medium.
These were shipped across the border to northern Finland where von Rosen and his guerrilla squad infiltrated remote Russian army garrisons and deposited the adulterated sugar cubes into feed troughs of horses and cattle.
[6] In his confiscated luggage were found maps of Russia and Finland, explosives, bottles with the toxin curare, and anthrax bacteria hidden in sugar lumps.
Two of von Rosen's sugar lumps went unnoticed when they were displayed for approximately eight decades in a police museum in Trondheim, Norway.