A horse named Warrior endures the brutal realities of World War I, serving alongside his master through years of conflict. The story follows Warrior, a thoroughbred, as he is passed between owners and eventually sent to the Western Front. There, he becomes the mount for General 'Galloping Jack Seeley,' participating in battles from the war's outset to its close, including the Battle of Moreuil Wood. The narrative highlights the shared experiences of horse and rider amidst the death and destruction of war, emphasizing Warrior's resilience and eventual return to England.

The description positions 'Warrior' as an inspiring and heart-warming short story, emphasizing devotion and bravery. It highlights the horse's heroic wartime exploits and eventual return to England, framing it as an evocative and powerful account of a real war horse. The text explicitly states that Warrior's story served as the basis for the fictional Joey in Michael Morpurgo's 'War Horse,' suggesting a narrative that resonates with themes of animal heroism and the impact of war. The reception is therefore framed around its historical significance and its connection to a well-known literary work.