Peter the Cruel vs Shajar al-Durr

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.

After the death of her husband As-Salih Ayyub, Shajar al-Durr became the de facto ruler of Egypt. She was proclaimed Sultana with the support of the Mamluk commanders. Her reign marked the first and only time a woman ruled Egypt in the medieval Islamic period.

To legitimize her rule and appease the Ayyubid caliph, Shajar al-Durr married the Mamluk commander Aybak. She abdicated the throne in his favor but retained significant influence. This marriage established the Mamluk Sultanate under Aybak's nominal rule.

Shajar al-Durr ordered the assassination of her husband Sultan Aybak in his bathhouse after he planned to marry another woman. She feared losing her power and influence. This act led to a power struggle among the Mamluks and her own downfall.

After Aybak's murder, Shajar al-Durr was arrested by the Mamluks loyal to Aybak. She was beaten to death by Aybak's concubines or slaves, and her body was thrown into a ditch. Her death ended the brief period of female rule in the Mamluk Sultanate.