488. Hundred Years' War: The Road to Agincourt (Part 2)

Episode Summary

Executive Summary: The episode tracks Henry V’s 1415 campaign from the landing at Harfleur through siege, disease, and the daring march toward Calais. It highlights Henry’s discipline and legality, the French failure to relieve Harfleur, and the strategic gamble of crossing the Somme. The episode ends with the English exhausted but alive, confronting the French host at Agincourt.

Main Topics: Landing at Harfleur and the opening of the campaign (Priority: 5/5): Henry lands unexpectedly near Harfleur in mid-August, using surprise and reconnaissance to secure a beachhead and begin the siege of his first French target. Siege warfare, ordinance, and discipline (Priority: 5/5): Henry imposes strict war ordinances, forbidding looting and attacks on civilians and clergy, while punishing breaches harshly to project himself as a lawful king rather than a marauder. Harfleur’s collapse under artillery, disease, and siege conditions (Priority: 5/5): The town’s weak walls, limited garrison, and lack of supplies are compounded by English cannon and by disease spreading through both sides, forcing surrender after four weeks. French response and command reshuffling (Priority: 4/5): France reorganizes after the humiliation of Harfleur, bringing in Marshal Boucicaut and the constable Charles d’Albret, while internal factionalism between Armagnacs and Burgundians complicates strategy. The march to Calais and the risk of overextension (Priority: 5/5): Instead of retreating, Henry chooses a dangerous march across northern France to Calais, partly to save face, partly to protect Harfleur, and partly to force a battle on favorable terms. Crossing the Somme and the narrowing of options (Priority: 5/5): French forces try to block crossings, but Henry finds and seizes a ford, crossing under pressure and keeping his army intact despite low supplies and worsening morale. Approach to Agincourt (Priority: 5/5): After days of hunger, rain, and uncertainty, Henry’s scouts find a massing French army near the village of Agincourt, setting up the confrontation that will be covered next.

Key Arguments: Henry’s discipline is not theatrical; it is a strategic and moral effort to make his army look like a legitimate royal force rather than a raiding host. Harfleur’s fall demonstrates that artillery, siege pressure, and disease can destroy a town even without a massive breach assault. The French failure to relieve Harfleur is a serious political humiliation and exposes the weaknesses of divided command. Henry’s march to Calais is a deliberate gamble designed to avoid humiliation, preserve Harfleur, and possibly provoke the decisive battle he wants. The crossing of the Somme is the critical operational danger: if Henry is trapped while hungry and exposed, his expedition could collapse. French civil conflict between Armagnacs and Burgundians undermines unified resistance even as the English advance deeper into France.

Data Points: Landing date: 17 August 1415 - Henry begins the Harfleur campaign three days after the fleet lands. Harfleur garrison estimate: as low as 35 men - The town is poorly defended when the English invest it. Town population: around 4,500–5,000 - Harfleur’s approximate early-15th-century population. Town size: 20 hectares - Approximate area of Harfleur. Wall length: 2.5 miles - Harfleur’s defensive perimeter. Siege duration: 4 weeks - Harfleur holds out longer than Henry expected. Truce request: 15 September 1415 - The garrison asks for a three-week truce as supplies fail. Surrender date agreed: 22 September 1415 at 1:00 p.m. - Harfleur agrees to surrender if no relief force arrives. March departure: 8 October 1415 - Henry leaves Harfleur for Calais instead of returning to England. English army size: about 6,000 - Estimated force with Henry on the march to Calais. Archers in Henry’s force: about 5,000 - Most of Henry’s army is composed of archers. Men-at-arms in Henry’s force: about 1,000 - The cavalry/heavy infantry element is relatively small. Initial marching plan: 8 days of food - Henry’s army carries provisions for the expected time to Calais. Direct route distance: about 100 miles - Estimate in the chaplain’s account. Henry’s route estimate: 150 miles - Henry believes the journey will be longer than the direct estimate. Somme crossing point: Blanche-Attack - The first ford Henry hopes to use is fortified by the French. French force at Blanche-Attack: 6,000 men - Charles d’Albret blocks the ford and demolishes crossings. Final approach to Agincourt: about 40 miles from Calais - The English are nearing their destination when the French finally concentrate ahead of them.

Pivotal Quotes: "For every day, they could find him in the open fields without any difficulty." — Henry V (via his herald): Henry’s response to the French challenge to battle, signaling confidence and openness to combat. "We thought of nothing else but this: that after the Eight days assigned for the march had expired and our provisions had run out..." — Henry’s chaplain: A contemporary account of the army’s fear that hunger and French pursuit will destroy the expedition. "The name of this village, It is Agincourt." — Henry’s scouts: The moment Henry learns the location of the French army blocking the road to Calais.

Implications: The episode frames Agincourt as the product of logistics, discipline, and calculated risk—not just battlefield valor. Henry’s choices turn a retreat into a showdown, but the French now have the numbers and the terrain to decide whether his gamble succeeds.