system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How was it possible for a heavily armored warrior to die in a battle? They couldn't get stabbed with neither swords nor arrows, could they?
gpt
Heavily armoured doesn't mean impervious to attacks. If they where truly impervious, they'd need a armour casting so heavy they wouldn't be able to move at all, at least with the metals and compounds used back then.

Stabbing through openings in the armour was one way of doing this, another was simply bludgeoning the enemy with a maul or a equivalent.

Armour quality is also a issue, hammering an axe against a poorly made piece of armour would've made either a nice huge dent, or slashed through it to hit the poor bloke wearing it.

Sometimes it was also a matter of using the heavy armour against the enemy. An example of this could be seen in the "Battle of Hemmingstedt" in Denmark, year 1500. A army of peasant took on the royal army, and won, even though they where (comparatively) lightly armoured. They achieved this through fighting in a marsh, and by having flooded the area prior to the royal army's charge, making the heavy armour cumbersome and hard to properly fight in due to the conditions, and the marsh made it near impossible to fight in a proper front, making knights and footmen easily outmanoeuvred by the lighter peasant.