The siege of Harfleur (18 August – 22 September 1415) was conducted by the English army of King Henry V in Normandy, France, during the Hundred Years' War.

After the walls had been seriously damaged by the twelve great guns and other traditional artillery of the English siege train, Henry planned a general assault one month to the day that the town had been enveloped.

The knights were released on parole to gather ransom, and those townspeople who were prepared to swear allegiance to Henry were allowed to remain, while the rest were ordered to depart.

Several historians criticised her methodology and preferred to maintain the higher casualty rates, pointing out that existing records are incomplete and that they are not reliable ways to estimate total troop numbers.

[15] Clifford J. Rogers considers the number of 36 deaths to be impossibly low and finds the higher contemporary figures believable, citing other historical examples of armies being heavily hit by dysentery.

[16] In the second edition of his volume "Cursed Kings...." (2016) Jonathan Sumption wrote that less the Harfleur garrison, the English army numbered 900 men-at-arms and 5,000 archers when the march began.

It is also fictionally portrayed in the historical novel Azincourt (2008) by Bernard Cornwell as well as the children's novel My Story: A Hail of Arrows (2009) by Michael Cox, and the Danish novel The Highest Honour (2009) by Susanne Clod Pedersen.