King Henry II vs King Louis of France

Henry had tons of land in France, like Normandy, Brittany, and Maine. 

He was supposed to be the French King's buddy, but he was actually way richer and had more power than him because he owned so much land in both France and Britain.

As if losing the battle wasn't bad enough, Henry went ahead and made things worse by stealing his wife 'Eleanor'.

This was a major blow to Louis and left him feeling even more humiliated than before.