A whole lot of dead people.
The English had the advantage at the beginning of the Hundred Years' War. The war was fought from 1337 to 1453.
War of the Roses was the civil war, it can be confused with the Hundred Years War, but the Hundred Years war had to do with England and France which is not civil to the English.
English
English
Calais
the fought in Orleans
french and english
orleans
Burgundy sided with Britain in the war
during the 100 Years War, English rulers turned to the Parliament
the answer is France and England
Rivalry between french and english kings.