Dominoes: War Horse (2)

'We'll be friends, you and I. I'll call you Joey,' Albert said. 'I'll look after you. We'll always be friends, I promise.'
Albert Narracott, a farmer's boy, makes this promise to his horse, Joey, in Devon, England. But this is before the First World War, and befor Joey leaves for France to become a war horse. What happens to Joey in the British army? What will the Germans
and the French do to him when they find him? And how will Albert find Joey again?