Answer:
Before the war people especially in Europe were still using medieval weaponry, including improved bows and arrows and swords, while after the war with the introduction of gunpowder people started using riffles and even artillery.
Step-by-step explanation:
Hundred years war between England and France started in 1337 and ended in 1453. England had advantage in the first phase of war because her bowmen were able to hit enemy's line from a large distance. This is a great example through which we can see that weaponry wasn't that much developed. In the last phase of the war and especially afterwards the widespread usage of gunpowder changed everything.