War Horse is one of five children's books that deal with war that was featured in a special exhibition titled Once Upon a Wartime – Classic War Stories for Children at the Imperial War Museum in London, that ran from 11 February – 30 October 2011. The exhibition details the historical background to the story, and exhibits include pages from Morpurgo's original draft of the novel.
On its first publication in 1982 the book was only translated into a 'handful' of languages. As a side effect of the interest in the film adaptation by Steven Spielberg, the publishers of the book have recently been "inundated" with requests for translation rights for the book to coincide with the film's release in late 2011.
The painting mentioned in the preface of the book, a portrait of Joey painted by Captain Nicholls and now hanging in the Village Hall (of an unnamed village), was a fiction of Morpurgo's. However, particularly since the success of the stage version of the book, so many tourists have come to the village of Iddesleigh, where Morpurgo lives, and asked to see the painting in the village hall, that in 2011 Morpurgo commissioned an artist to paint just such an oil painting to hang there. He used equine artist Ali Bannister, who acted as the chief "equine hair and make-up" artist on the Steven Spielberg film of the book, and who also drew the sketches of Joey seen in the film.
An exhibition entitled War Horse: Fact & Fiction opened in October 2011 at the National Army Museum exploring the novel alongside real-life stories of horses involved in war and the men who depended on them, and also drawing on the play and film adaptations of the novel.