Answer:
Battle of Hastings
Explanation:
After the Battle of Hastings, "William the Conqueror" became King of England, since then France ruled England for about four centuries.
One of the main effects was on language, the Anglo-saxon language or Old English would adopt new vocabulary and pronunciation which resulted in Middle English, a much richer and milder language used by many famous authors of the Renaissance like William Shakespeare and Geoffrey Chaucer.
