Throughout history man has made use of animals in his warfare. During the Middle Ages the “Man on horseback” gained many victories against those on foot who opposed him and it was not until the effective use of the long bow and gun powder that the foot soldier could hold his own in combat. The first animal that European man domesticated was the dog. Even as late as World War II canines of several breeds were used by both sides to guard against surprise attack and to track down fleeing foes and prisoners.
Covington, James W.
"Cuban Bloodhounds and the Seminoles,"
Florida Historical Quarterly: Vol. 33
, Article 5.
Available at: https://stars.library.ucf.edu/fhq/vol33/iss2/5