So how did medieval soldiers train for war? Check out this awesome digital wargame, Field of Glory II: Medieval https://store.steampowered.com/app/1368870/Field_of_Glory_II_Medieval/

In this history documentary we continue our dive into the mechanics of Medieval warfare. The last episode covered how to raise a medieval army which serves as a good primer. This episode seeks to dive deeper by looking at how individual soldiers prepared for battle. We break down this training by major army groups: the aristocratic retinue, the non-aristocratic freemen, and the mercenaries. This involves everything from general fitness, to weapons training, mock combat, and of course practical experience. Stay tuned for more episodes on Medieval history.

Sources and Suggested Reading:
Clifford Rogers, Soldiers Lives Throughout History: The Middle Ages
“Exercises in Arms: the Physical and Mental Combat Training of Men-at-Arms in the Fourteenth and Fifteenth Centuries,” Pierre Gaite, Journal of Medieval Military History
“Yron & Stele: Chivalric Ethos, Martial Pedagogy, Equipment, and Combat Technique in the Early Fourteenth-Century Middle English Version of Guy of Warwick,”
B Ann Tlusty, The Martial Ethic in Early Modern Germany
“Archery Practice in Early Tudor England,” Steven Gunn, Past & Present no. 209
Archery and Crossbow Guilds in Medieval Flanders, Laura Crombie
Aldo Sietta, “Military Games and the Training of the Infantry,” Journal of Medieval Military History vol. 11
Michael Mallett, Mercenaries, Medieval Wafare: A History
Matthew Strickland and Robert Hardy, The Great Warbow
William Caferro, John Hawkwood, English Mercenary in Fourteenth Century Italy
“Arms and the Art of War: The Ghentenaar and Brugeois Militia in 1477–79,” J. F Verbruggen, Journal of Medieval Military History