Saint Crispin’s Day falls on 25 October and is the feast day of the Christian saints Crispin and Crispinian (also known as Crispinus and Crispianus, though this spelling has fallen out of favour), twins who were martyred circa A.D. 286.
It is a day most famous for the battles that occurred on it: the Battle of Agincourt in 1415, the Battle of Balaklava (Charge of the Light Brigade) during the Crimean War in 1854 and the Battle of Leyte Gulf in the Pacific theater in 1944.
Speaking of Agincourt [and Crecy for that matter] we were looking at the power of slingshots, longbows and crossbows. Longbows are the best, we felt, except for the way the string chafes your forearm.
It would be interesting to know if archers in those days wore leather arm protection or not.