Why did the author include quotations from people who were present when George Washington and his troops crossed the Delaware?

The author included quotations from individuals who witnessed George Washington and his troops crossing the Delaware to provide firsthand accounts that enhance the narrative's authenticity and emotional impact. These testimonies offer a personal perspective on the historical event, allowing readers to connect more deeply with the experiences and sentiments of those involved. Additionally, such quotes serve to illustrate the significance of the moment in American history, showcasing its dramatic and heroic nature.