What is the external conflict in cub pilot on Mississippi?

In "Cub-Pilot on the Mississippi", the external conflict that the protagonist, Huck, faces is the societal expectations and prejudices prevalent during his time. Specifically, the novel highlights the conflict between the societal norms of the antebellum South and Huck's own moral compass. Huck experiences several instances where he has to choose between conforming to these expectations and following his conscience, which often leads him into dangerous and challenging situations.