Background Information

Events from there are highly compressed, but reasonably accurate.

• Henry besieged Harfleur for weeks, suffering mightily for it, before the town surrendered through negotiations. The town and its inhabitants were largely spared, and those who swore allegiance to Henry were able to remain. Even the citizens who were deported were allowed to take whatever they could carry and given money by the English for their travels.

There is even an account of an English soldier being hanged for robbing a church, mirroring Bardolph's crime and execution in the third act of the play.

While history bears out that Henry's army was indeed outnumbered and severely weakened, no one seems to be able to agree on the exact numbers of the combatants or the casualty figures (About Agincourt)

However, the treaty was signed (and the royal couple wed) in 1420, some five years after Agincourt. Shakespeare's play presents it as more closely following the victory.