Why were the french army called the Huns in the 17th century?

In the 17th century, the term "Huns" was used by some to describe the French army, particularly by their enemies, as a way to depict them as barbaric and aggressive invaders. This characterization was partly rooted in the perception of the French as a formidable military force during conflicts like the Thirty Years' War. The label also played on historical stereotypes, drawing parallels between the French and the ancient Huns, who were seen as ruthless conquerors. Such terminology was often employed in Propaganda to delegitimize opponents and rally support.