The perspective that a European living in a country conquered by the Mongols is most likely to have is:
The Mongols were responsible for the murder of millions of people in their conquest of European countries.
Reasoning: A European in a conquered territory would likely focus on the immediate and brutal impact of the Mongol invasions, which were often marked by significant violence, destruction, and loss of life. The Mongol campaigns were infamous for their military tactics, brutality, and the devastation they caused in various regions. This perspective emphasizes the fear and trauma associated with the Mongol invasions, rather than the potentially positive outcomes such as unification of trade routes or the spread of knowledge, which may not have been as apparent or relevant to someone experiencing the violence of conquest firsthand.