Final answer:
Religion was the most important aspect of identity in medieval Europe and played a central role in society and politics, as seen in the Spanish Reconquista of the Iberian Peninsula.
Step-by-step explanation:
Medieval Europeans did indeed consider religion to be the most important marker of identity. Religion permeated every aspect of life and it was through the institutional Church that most medieval people believed they could achieve spiritual salvation. This concept was especially evident in large historical patterns such as the feudal system and the dominance of the Latin Church. Key cultural traits in early medieval Europe were greatly influenced by religious beliefs and practices. Additionally, the Spanish reconquering of the Iberian Peninsula, known as the Reconquista, was both a military and religious action. This period was marked by the attempt to reclaim territories from Muslim rulers and was motivated by a desire to reestablish Christian rule throughout the peninsula. The Reconquista is a prime example of how religion could drive military campaigns and shape the geopolitical landscape of the time.