In Act I, Scene 2 of “Henry V,” King Henry meets with his advisors in the presence chamber to discuss his claim to the French throne. The Archbishop of Canterbury and the Bishop of Ely present a detailed legal argument based on Salic Law, explaining why Henry has a legitimate right to claim France through his great-great-grandmother Isabella. Canterbury urges Henry to pursue his claim with confidence, reminding him of his ancestors’ victories in France, particularly Edward III and the Black Prince at Crécy. The nobles present—including Exeter, Westmoreland, and others—strongly encourage the King to invade France, promising their full support and pledging to defend England against Scottish invasion during his absence.

The French Ambassador then arrives bearing a message from the Dauphin in response to Henry’s earlier claims. The Dauphin has sent a mocking gift of tennis balls, suggesting that Henry is too young and frivolous to be taken seriously as a warrior king. Henry responds with controlled anger, transforming the Dauphin’s jest into a prophecy of war. He declares that the tennis balls will be struck back as cannonballs, and that the Dauphin’s mockery will cost thousands of French lives. Henry formally announces his intention to invade France, commands his nobles to prepare for war, and dismisses the Ambassador with a stern warning for the Dauphin. The scene ends with Henry’s determination to claim his “rightful” inheritance through military force.

Henry V follows the young English king as he transforms from the wayward Prince Hal into a decisive military leader. The play opens with Henry’s court debating his claim to the French throne through his great-great-grandmother’s lineage. When the French Dauphin mockingly sends Henry tennis balls as a gift, suggesting he should stick to games rather than warfare, Henry uses this insult as justification to invade France. He sentences three conspirators - Cambridge, Scroop, and Grey - to death for plotting against his life, then sets sail for France with his army.

The English forces land in France and lay siege to Harfleur, which Henry captures after his famous “Once more unto the breach” speech. However, his army is weakened by disease and casualties. Meanwhile, we follow the tavern companions from Henry’s youth - Pistol, Nym, Bardolph, and Hostess Quickly, who reports the death of Falstaff. The English army, vastly outnumbered, faces the French at Agincourt. On the eve of battle, Henry disguises himself and walks among his soldiers to gauge their morale, engaging in philosophical discussions about kingship and responsibility.

The Battle of Agincourt proves to be a decisive English victory despite overwhelming French numerical superiority. Henry orders the killing of French prisoners when he believes the French are regrouping, and becomes enraged when he discovers French forces have killed the English boys guarding the baggage train. The English suffer minimal casualties while French losses are enormous. The play concludes with Henry’s courtship of Princess Katherine of France, conducted partly in broken French and English. Their marriage seals the Treaty of Troyes, which names Henry as heir to the French throne, though the Chorus epilogue reminds the audience that Henry’s son would later lose these French territories.