Hello everybody,
After a crafty marriage, I managed to get my nephew to inherit the Duchies of Aquitaine, Gascogne, and Poitou. Since my nephew is a member of my dynasty, I was under the impression that he would become my vassal after he inherited those duchies, but he did not - his liege is the King of France.
Is there any way for me to make him break away from his liege and become a part of England, or is he stuck being under the King of France? Also, can someone explain to me what I did wrong? I'm trying to play this game without forging claims or assassinating people - I want to earn my territory through marriages.
Thank you for reading.
Here is a picture of the Duke in question:

After a crafty marriage, I managed to get my nephew to inherit the Duchies of Aquitaine, Gascogne, and Poitou. Since my nephew is a member of my dynasty, I was under the impression that he would become my vassal after he inherited those duchies, but he did not - his liege is the King of France.
Is there any way for me to make him break away from his liege and become a part of England, or is he stuck being under the King of France? Also, can someone explain to me what I did wrong? I'm trying to play this game without forging claims or assassinating people - I want to earn my territory through marriages.
Thank you for reading.
Here is a picture of the Duke in question: