"Guess I'll have to update my royal stationary... 🤷‍♂️👑 #GoodbyeIndependence #HelloFrance" - Duke Francis II of Brittany

Aug 13, 1532 - Union of Brittany and France: The Duchy of Brittany is absorbed into the Kingdom of France.
https://en.wikipedia.org/wiki/Union_of_the_Duchy_of_Brittany_with_the_Crown_of_France