(1) The Germans used anthrax and glanders against the horses and mules of the US Army and its Allies in World War I.

(2) In the first world war attempts were made to infect horses with glanders , and throughout history invading armies have poisoned wells and other water sources.

(3) Aspiration of the abscesses grew B. mallei, the cause of glanders .

(4) Work was in progress, too, on other agents like brucellosis and glanders as well as on chemicals against plants, classified at the time as a form of biological, not chemical, warfare.

(5) A closely related pathogen, namely B. mallei is an obligatory zoonotic parasite causing glanders , but it seems to have virtually disappeared from domesticated animals and humans, decades ago.