Margaret II of Avesnes vs Peter the Cruel

Margaret II inherited the counties of Hainaut, Holland, and Zeeland after the death of her brother William II at the Battle of Warns. She became the last Avesnes ruler of these territories.

Margaret II fought a war against her son William I of Bavaria (Wittelsbach) for control of Holland and Zeeland. The conflict ended with the Treaty of 1354, where she ceded these territories to William.

Margaret II of Avesnes, Countess of Hainaut, ceded the counties of Holland and Zeeland to her son William I of Bavaria (Wittelsbach) after a period of conflict. This transfer ended Avesnes rule in Holland and Zeeland.

Peter I's conflict with his half-brother Henry of Trastamara escalated into a full-scale civil war. The war divided Castile between supporters of Peter and Henry, with involvement from France and England as part of the Hundred Years' War.

Peter I formed an alliance with Edward the Black Prince of England, who led an army into Castile to restore Peter to the throne after he was deposed by Henry. The alliance brought English military support but at a high financial cost.

Peter I and Edward the Black Prince defeated Henry of Trastamara's Franco-Castilian army at the Battle of N

Peter I was captured and killed by his half-brother Henry of Trastamara after the Battle of Montiel. Henry personally stabbed Peter to death, ending the civil war and establishing the Trastamara dynasty in Castile.