Final answer:
The mappamundi's influence on the First Crusade isn't a simple true or false question, but the Reconquista and the Spanish conquest of the Aztec involving native allies is true, as is the Proclamation of 1763 being a response to Pontiac's War.
Step-by-step explanation:
The use of mappamundi, or medieval European maps of the world, did play a role in the period leading up to the First Crusade. These maps often reflected the religious and cultural priorities of the era, and in the context of the Crusades, they sought to depict Christian territories and the broader religious landscape that the Crusades were set against. However, the question about the mappamundi is not clearly answered by 'True' or 'False' without additional context about how these maps influenced the Crusades. In a more specific sense, reconquering the Iberian Peninsula, known as the Reconquista, was indeed both a military and religious campaign for the Spanish, aiming to reclaim land from Muslim control which is correctly answered as 'True'. Similarly, recruiting native allies was critically important to the Spanish during their conquest of the Aztec Empire, also making that statement 'True'. The Proclamation of 1763, mentioned in another provided context, was indeed partly a response to Pontiac's War, which is also 'True'.