情報社会のなか、資料も自身の目で見る方が優れているため、プレイ中の使用した参考資料を以下にまとめております、#14 Wongsrichanalai, Kanisorn. "Potomac River during the Civil War" Encyclopedia Virginia. Virginia Humanities, (07 Dec. 2020). https://encyclopediavirginia.org/entries/potomac-river-during-the-civil-war/#15 “Union Hospitals in Alexandria.” City of Alexandria, VA, September 19, 2023. https://www.alexandriava.gov/historic-sites/union-hospitals-in-alexandria. #16 The Brooklyn Daily Eagle. Brooklyn, New York, November 19, 1860. page 3. article on tug boat USS Thomas Freeborn https://bklyn.newspapers.com/image/50418702/?fcfToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmcmVlLXZpZXctaWQiOjUwNDE4NzAyLCJpYXQiOjE3MjMzNTk1OTksImV4cCI6MTcyMzQ0NTk5OX0.94EkurX9_8rdkY_Up_vjd7RxZjfvm7Q-eYd_pfD1VTc#17 Frank Leslie's Illustrated Newspaper, Naval Historical Center, https://en.wikipedia.org/wiki/File:Attack_on_the_Confederate_Batteries_at_Aquia_Creek,_June_1,_1861.jpg 他参考資料In The Photographic History of the Civil War, Vol. 6. New York, NY: Review of Reviews Co, 1911. 94-96p https://archive.org/details/photographichist06inmill 一般閲覧を許可している資料ですので、興味があれば閲覧下さい。