France outlasted the English. The Wars of the Roses left England in no position to wage war in France, thus ending the one Hundred Years War.
The high number of sieges in the Hundred Years War led to the development of technology with new siege engines and the use of the longbow as an English weapon. These developments ended the power of the mounted knights.
When Henry II of England married Eleanor of Aquitaine, the territory that came with the union gave the king of England control over more French lands than the king of France. This situation came to a head in the early 14th century, when both countries struggled for control of Flanders.
Although the Hundred Years War was fought by England and France, they were not the only countries involved in the war. Battles spilled into Italy, Spain and Germany.
England's last gasp came when it aided the region of Gascony. There the English saw the defeat of their last great veteran of Agincourt at the hands of a superior French force.
During Philip VI's reign fortune favoured the English. The French fleet was destroyed at Sluys on the 24th of June 1340.
In the beginning of Charles VI's reign the struggle between the two countries seemed to weaken. An attempt at reconciliation took place on the marriage of Richard II with Isabella of France, daughter of Charles VI.
Richard II was more awed by the French court than his own. He took great efforts to make peace with Charles VI, then king of France.
William the Conqueror controlled large areas of France as feudal fiefs and thus posed a threat to the French monarchy. During the 12th and 13th centuries the kings of France attempted, with growing success, to reimpose their authority over those territories. England feared losing these territories.
The Hundred Years' War is the name given to the series of armed conflicts, broken by a number of truces and peace treaties, that were waged from 1337 to 1453 between England and France. An immediate pretext for war was the claim of the kings of England to the French throne.