On October 25, 1415 — England was at war with France during the latter part of the 100 years war, and King Henry V had led his men into France after negotiations broke down following a relative peace between the two countries. It was in this battle that several important observations could be made about warfare. First, it is thought by many that it was at this battle that chivalry died. Second, it proved the effectiveness of the English longbow against the overwhelming numbers and odds they faced.

After the invasion of France by Henry V, the English decided after a few months on the campaign that they would head back to England, and were marching back to the French town of Calais to be taken back to England across the English channel. That was when they were blocked by the French at Agincourt. King Henry V decided it best to stand and fight as it was thought the French had reinforcements on the way to add to the already overwhelming numbers in strength the French had that day.

On October 25, the French army attacked. However, due to the mud from the field being both currently plowed and soaked from a recent rain, the French had mobility trouble due to their numbers and better armor. They were slaughtered by the English and many French were taken prisoner. They had effectively demonstrated the efficiency and lethality of the English longbow. However, both weather and terrain were a significant factor in the English victory. The French were forced into somewhat of a funnel from which they could not escape given the number of men charging towards the English in the mud. Their armor did not make it any easier as they were easy targets for the English and whoever was able to escape the longbow were killed or captured by the English. It was a stunning defeat for the French.

After taking prisoners, Henry ordered the execution of many high ranking prisoners contrary to the chivalric code, in which the norm at that time was to take the prisoners back to England for ransom. Before the battle, it was customary for knights, nobles, and other high ranking members to be taken prisoner for ransom. A good ransom would have been a considerable amount of money for the common soldier in the English army, however, and perhaps given that the English were already outnumbered Henry ordered the execution of the French prisoners. This is thought by many to be the end of chivalry.

Other notable battles on October 25 are the Battle of Balaclava (The Charge of the Light Brigade) in 1854, and the Battle of Leyte Gulf, which took place in 1944.

Morning of the Battle of Agincourt on 25th of October, 1415.

St Crispins Day Speech from “Henry V” by William Shakespeare

Then will he strip his sleeve and show his scars,
And say “These wounds I had on Crispin’s day.”
Old men forget; yet all shall be forgot,
But he’ll remember, with advantages,
What feats he did that day. Then shall our names,
Familiar in his mouth as household words—
Harry the King, Bedford and Exeter,
Warwick and Talbot, Salisbury and Gloucester
Be in their flowing cups freshly rememb’red.
This story shall the good man teach his son;
And Crispin Crispian shall ne’er go by,
From this day to the ending of the world,
But we in it shall be rememberèd—
We few, we happy few, we band of brothers;
For he to-day that sheds his blood with me
Shall be my brother; be he ne’er so vile,
This day shall gentle his condition;
And gentlemen in England now a-bed
Shall think themselves accurs’d they were not here,
And hold their manhoods cheap whiles any speaks
That fought with us upon Saint Crispin’s day.