Historically:
* Ancient Civilizations: Ancient civilizations like the Egyptians, Greeks, and Romans recognized the importance of animals in war, using them for transportation, communication, and combat. While evidence of formal veterinary practices is limited, it's likely that skilled individuals, perhaps those with experience in animal husbandry, would have been tasked with treating wounded animals. We see evidence of this in the writings of Hippocrates, who discussed the care of war horses.
* Medieval Period: In medieval Europe, knights and nobles often relied on horses for war. It's likely that blacksmiths, farriers, and even monks (who were often skilled in herbal remedies) would have provided care to wounded horses and other animals.
* Early Modern Period: As the use of animals in war intensified, particularly with the rise of cavalry units, there was a growing need for more specialized care. This led to the development of "farriers," who focused on the care of horses' feet and legs, and later, "veterinary surgeons" who began to specialize in treating more complex wounds and illnesses.
Modern Warfare:
* 20th and 21st Centuries: With the rise of modern veterinary medicine, military forces have established dedicated veterinary units. These units are responsible for the health and well-being of military working dogs, horses, mules, and other animals used in war. They provide preventive care, treat wounds, and even perform surgeries.
While the exact nature of "veterinarians" in ancient war might be debated, the need to care for wounded animals has always been a reality. Throughout history, skilled individuals have stepped up to provide the best possible care for the animals that serve alongside humans.