A Swedish officer reflecting on the Battle of Nördlingen expressed his admiration for the Spanish infantry, describing them as unwavering and resilient. He noted that they seemed almost unbreakable, exhibiting patience and determination in the face of challenges. This statement illustrates the respect and acknowledgment of the exceptional qualities displayed by the Spanish soldiers during the conflict.

Arturo Pérez-Reverte's book, "A History of Spain," captures this sentiment, showcasing how the Spanish infantry's steadfastness left a lasting impact on their opponents. The officer's words highlight a sense of awe at the formidable spirit of the Spanish troops, emphasizing the intensity and the significant challenges faced in battle.