Which advances in weaponry developed during the hundred year’s war made war more deadly?

During the Hundred Years' War, advancements in weaponry that made war more deadly included:

1. Longbows: The English longbow was a highly effective weapon that had a longer range and greater penetrating power than traditional bows. This gave the English archers a significant advantage over their opponents.

2. Cannons: The use of cannons became more widespread during the Hundred Years' War, causing significant destruction and increasing the casualties on the battlefield.

3. Plate armor: The development of more advanced plate armor provided better protection for soldiers, but also increased the deadliness of weapons as they had to become more powerful to penetrate the armor.

4. Polearms: Weapons like the halberd and pike became more common during this time, offering soldiers greater reach and striking power in combat.

5. Firearms: While still in their early stages during the Hundred Years' War, the use of firearms (such as arquebuses and early hand cannons) marked a shift towards more ranged and devastating weaponry that would continue to develop in the following centuries.