Early in the 20th century, as microbiology developed, the etiologic agents of many diseases were identified, and many of these were grown and studied in laboratories allowing biological warfare to become more sophisticated.
Horses and Cavalry in WWI
In the First World War, German and French agents used glanders (also known as Equinia, Farcy, and Malleus), a bacterium (Burkholderia mallei) which occurs in horses and donkeys as well as another animal bacterium called...