The Hundred Years War was a long war involving Franceball on the one side, and Englandball on the other. Eventually, most western European powers will get involved, including Burgundyball, the Holy Roman Empireball, the Spanish crowns, and even the Pope.
It was actually 116 years, not exactly 100 years.
Franceball finally wins in 1453, after numerous bloody battles.
Battle of Crécy : Englandball's bows kills Franceball's knights.
Battle of Poitiers : Englandball captures Franceball, and takes back Aquitaineball.
Battle of Cocherel : Navarreball pokes Franceball, which doesn't like it.
Battle of Agincourt : Englandball's bows kills Armagnacball's and Franceball's knights. Again. Takes back Normandyball and Aquitaineball. And half of Franceball's clays.
Siege of Orleans : Franceball uses Pucelle Strike. It's super efficient.
Battle of Gerberoy : Franceball at last found a shield. It takes back Normandyball. Burgundyball surrenders.
Battle of Chatillon : Franceball steals Englandball's bow. Englandball has to go back home. Aquitaineball is taken by Franceball.