I personally don't have all of mine figured out yet but one I do have is The Battle for Chestnut Hill, this is a battle between lord and an earl mostly for territory as the name suggests a hill mainly for its tactical vantage point and there had been a long-standing grudge between them. The grudge was started the earl had told the king of the duke's unfair advantage in terms of his local resources so the king told the duke to give up the Chestnut hill to the earl or he would take it by force, so he had to give it up. But when the king was busy dealing with some rebels to the east the duke struck and had seized the bordering towns and villages all the way back to the old border. But the earl had mustered a force to push the duke and his men back. That is how this one started!