AlexanderA
Member
Remember that plate armor was a relatively late development. Its heyday was only about 300 years, c. 1375 - c. 1675. And even during its heyday, it was mostly used to cover the most vital parts of the body. (Complete head-to-toe armor was only for the super-rich, and was used mostly for parades and jousting tournaments.) Basic armor was still chain mail, which could be penetrated by longbow arrows.