Sancho II of Castile Turns Against Alfonso…
1068 CE
Sancho II of Castile Turns Against Alfonso VI: The Battle of Llantada (1068 CE)
After failing to gain more territory from Navarre, Sancho II of Castile shifts his focus to his brother and rival, Alfonso VI of León, seeking to expand his dominion at Alfonso's expense.
In 1068 CE, the two brothers clash at the Battle of Llantada, where Sancho II emerges victorious. However, despite this military success, he is unable to seize control of León, and Alfonso VI retains his kingdom.
This battle marks the beginning of open conflict between the sons of Ferdinand I, as they fight for supremacy over their father’s divided inheritance, leading to further dynastic struggles in Christian Iberia.