The Hundreds years’ war

The Hundreds years’ war was between England and France fighting over succession to the French throne. It lasted from 1337 to 1453, so it might more accurately be called the "116 Years' War".

        Anyway, it started in 1337 when Edward III refused to pay homage to Philip VI of France, leading the French King to confiscate Edward's lands. Edward responded by declaring himself to be the rightful King of France rather than Philip, a claim dating to 1328 when Edward's uncle, Charles IV of France, died without a direct male heir. The outcome became 116 years of war over land.

        In the end of late 1453, Henry IV of England became insane. By 1453, the coast of Calais is the only English possession left in France till the mid-1500s.

        Ways that I thought would make a difference was either Edward III could have just paid the homage or that British Royalty could stop to marry French Royalty and vice versa. If British Royalty didn’t marry French Royalty, then there wouldn't be this long family tree where both kings had the bloodline to succeed the throne. Well, that could probably result in the disappearance of Edward III.