Some call them the forgotten heroes of war, but a new exhibit in London seeks to pay tribute to the millions of horses who died serving in battle over the centuries.
Within seconds of stepping into the War Horse exhibit at London's National Army museum, visitors are transported to the lush green fields of Devon.
The pastoral scene also features in the children's novel and play that inspired the exhibit. "War Horse" was written by Michael Morpurgo and it opens as a horse appropriated from a Devon farm and shipped off to the front.
Morpurgo said it all began when he met a WWI veteran of a cavalry regiment in his local pub.
Morpurgo asked him what he did during the war.
"And then he said something wonderful. He said 'I was there with 'orses.' And he said it like that "with 'orses.' And then he just started talking," said Morpurgo.
The new exhibit traces the use of horses in war down the centuries through WWI. Curator Pip Dodd said they were critical and not just for charging into battle.
"The horse really was the motorized vehicle the helicopter and the transport ship and plane of its day. They were hugely important," said Dodd.
There are also reminders of the grueling, often deadly conditions the animals endured even before they reached the battlefield.
One room recreates a ship's hold, complete with creaking boards. Dodd said the demand for horses in WWI was enormous.
"In the first 12 days the British army bought up about 120 thousand British horses from farms and from bus companies but there weren't enough or good enough to be army horses so they had to look further afield, " he said.
They looked to the United States.
More than three hundred thousand horses and mules were sent over on transport ships, many dying en route. Those that made it were then shipped out again and into battle.
The video opening the exhibit recreates moments of horror and violence.
Morpurgo heard about it firsthand from the veteran he met., but what really touched him was the former soldier's intense bond with the horse who carried him to the front lines when he was all of 17 years of age.
"He was terrified. They were all terrified, he said. All his pals were terrified but they couldn't talk about it. They absolutely could not talk about it. And he must not talk about it, he knew that. So the only person he could talk to and he used the word person, the only person (he) could talk to was (his) horse. And (he) would go to the horse lines at night when (he) was feeding them, and (he) would stand by them and I'd stroke the neck and (he) would whisper into his ear and (he) would tell him stuff I could never even mention to my pals because we were all going through it anyway," Morpurgo recounted.
The author's book and play, like the exhibit focus on the warriors who never chose to go into battle and never knew what was was coming.
Of the 1.2 million horses used by the army, nearly half died. For Morpurgo, it is a vivid reminder of the cost of war.
"Roughly the same number of men and horses died in the First World War. So they did this thing together. It was extraordinary courage, loyalty, horror all together. But they didn't do it apart they were supporting each other," he said.
Curator Pip Dodd admitted to being moved by what he discovered during his research.
"Of course the vast majority of horses that served are now completely unknown and unknowable and anonymous and there were millions of them and so somehow we wanted to pay our respects really so we came up with the idea of this mirror box," he said.
The box, surrounded by mirrors, is filled with dozens of cutout horses. The mirrors reflect off each other, multiplying the number into infinity.
Of all the horses used in war, only a handful returned to Britain. The rest were sold over seas as as riding horses, work horses or for their meat. Morpurgo finds that almost unforgivable.
For him, the horses of war are heroes just as much as the soldiers who relied on them.
Steven Spielberg plans to release a film version of War Horse in December.