Ransom and heraldry...choosing the lucrative target over the proper military target...the English never won Agincourt, but rather the French lost it.
How the heck did it happen?
Battlefield detectives... http://www.youtube.com/watch?v=uy7DT_FTms0&feature=related
The archers did not follow ettiquette, and were prepared to bash knights with their hammers and climbed up onto the horses and stabbed the knights in the neck. Sure they did....
And I'm Mahatmah Ghandi. Excuses, excuses, excuses.
This episode of battlefield detectives is remarkable for covering previously unconsidered factors. Crowd control, too many people in too little space, stamping around in the mud.
Nah, it wasn't the archers. It was the idiots running the show.