Nowadays, the animals aren't used in warfare anymore, but one charity thinks they can help veterans adjust to life as civilians.
The idea for HorseBack UK came to Jock and Emma Hutchison over the Christmas period in 2008.
Military friends who visited had enjoyed playing with their horses and one casually commented:
“This is what the guys should do when they come back from war.”
For nearly a decade the charity has been providing veterans with an introduction to everything equine.
Participants stay for three week-long residential courses, are taught to ride and given training in all aspects of horse care.
“Veterans have served in teams,” said Mr Hutchison, “and one of the greatest things that you can have in life, in my opinion, is to have a sense of purpose whilst being in a team that you’ve got a real identity with.
“Horsemanship is essentially leadership, it’s all about [the] team, it’s all about getting the horse to trust you enough that he is willing to follow you - not just being dragged about.
"And in that process, you’re actually using the same part of your brain that you would do if you’re engaging with people – only without the social pressures.”