What did the knights do to show loyalty to the king?

Knights demonstrated their loyalty to the king through acts of fealty, which included pledging an oath of loyalty in a formal ceremony. They served in the king's army, providing military support during conflicts and protecting the realm. Additionally, knights managed lands granted by the king, ensuring the king's interests were upheld in their territories. Their loyalty was often reinforced by the code of chivalry, which emphasized honor, bravery, and service to their sovereign.