The Battle of Alcácer Quibir took place in 1578 in Morocco, where the forces of the Portuguese king, Sebastian I, faced the army of the Moroccan Sultan, Abu Abdallah Mohammed II. King Sebastian aimed to expand his influence in North Africa but underestimated the strength of the Moroccan forces. The battle ended in a disastrous defeat for the Portuguese, leading to the death of Sebastian and many of his soldiers. This defeat had significant consequences for Portugal, as it led to a succession crisis. With no direct heir, the Portuguese crown eventually passed to the Spanish monarchy, marking the beginning of the Iberian Union. The battle is remembered as a pivotal moment in Portuguese history, highlighting the risks of imperial ambition.