On the surface, the Dukedom of Leo only had less than ten grand knights, but that was only on the surface. It did not explain anything.
Kant was very clear about the nature of the noble. Their strength was like an iceberg on the sea, and only a small part of it was exposed. However, the strength hidden in the dark could be several times stronger than on the surface, as it was the foundation of their existence.
If there were some wanted to fight with the nobles who only showcased an iceberg of their true strength, these dumb people would probably die in the end.
Take Kant himself for example. Even though he had displayed extremely terrifying power and strength, who knew that these weren't Kant's real trump cards?
Even the Drondheim Castle and Aaron Town that were still hidden in the dark weren't Kant's trump cards.
Kant's trump card was actually a system that was connected to him and could not be separated from each other.