How did the Hundred Years War effect medieval society ?

greater feeling of nationalism! another thing during taxes and death increased as well but the aftermath was the.whole nationalism side.

Explanation:

Here's some bullet points I found of the affects all in one! hope it helps!

The loss of all English-held territory in France except Calais.A high number of casualties amongst the nobility, particularly in France.A decline in trade, especially English wool and Gascon wine. A great wave of taxes to pay for the war which contributed to social unrest in both countries.Innovations in forms of tax collection.The development of a stronger Parliament in England. The almost total bankruptcy of the English treasury at the war’s end. The disagreement over the conduct of the war and its failure fuelled the dynastic conflict in England known as the Wars of the Roses (1455-1487 CE). The devastation of French towns and villages by mercenary soldiers between battles. Developments in weapons technology such as cannons. The consolidation of the French monarch’s control over all of France. A greater use of international diplomacy and specialised diplomats.A greater feeling of nationalism amongst the populations of both countries. The creation of national heroes, notably Henry V in England and Joan of Arc in France.A tangible rivalry between the two nations which still continues today, seen particularly in sports such as football and rugby. 

The war, boosted by stirring medieval literature, poems and popular songs, fostered a greater feeling of nationalism on both sides. Kings appealed to their armies prior to battles to fight for their king and country.