King Henry IV has died and his son Prince Hal reigns. It's war with France and all England rises up to back the King. At the city of Harfleur, the King and his forces encounter stiff resistance and King Hal rally's his forces with the patriotic rallying speech "Once more unto the breach, dear friends, once more..." England is united under Henry's leadership and win Harfleur. He then goes on to win the Battle of Agincourt and the French King surrenders. He offers Henry the hand of his daughter, Katherine of Valois, in marriage so uniting England and France. After he marries Katherine, peace rules, and they have a son. However, after King Hal dies and his son becomes Henry VI, war again looms on the horizon.