Answer:
The answer is the blacksmith hammered three nails into each horseshoe.
Step-by-step explanation:
The King Richard was unable to fight and lead his army after his horse lost his shoes and ran away. He shouted: "my kingdom for a horse"
There was no horse available for him and his soldiers couldn't save him. So, he lost the battle and the crown. The duke of Richmond made war upon him and defeated him in a great battle.