Card soldiers are fictional characters from the book Alice's Adventures in Wonderland by Lewis Carroll. They are depicted as playing cards, typically painted in red or black, and serve the Queen of Hearts. Each card soldier has a specific rank, such as the King, Queen, Jack, and numbered cards, and they often display human-like traits and behaviors. In the story, the card soldiers are known for their strict adherence to the Queen's orders and their somewhat clumsy nature. They are often involved in various whimsical and nonsensical situations, reflecting the absurdity of the Wonderland setting. Their interactions with Alice highlight themes of authority and conformity.