“Uncovering the Hidden Genius: The Surprising Origins of the World’s First Machine Gun!”

Leonardo da Vinci – Weapons of War, Italian Renaissance Art, https://www.italian-renaissance-art.com/Da-Vinci-weapons.html#gallery[pageGallery]/9/

Marder, Patrick, Mitrailleuse, Debellum, https://web.archive.org/web/20060620004234/http://www.debellum.org/mitrailleuse.asp

Gatling Gun, History, September 9, 2021, https://www.history.com/topics/american-civil-war/gatling-gun

LaFrance, Adrienne, People Thought Machine Guns Might Prevent Wars, The Atlantic, January 26, 2016, https://www.theatlantic.com/technology/archive/2016/01/maxim-guns/428253/

The Gatling Gun, Civil War Guns, January 26, 2018, https://civilwarguns.blogspot.com/2018/01/the-gatling-gun.html

Part II – Manually Operated Guns, https://www.ibiblio.org/hyperwar/USN/ref/MG/I/MG-2.html

McCollum, Ian, Union Repeating Gun, Forgotten Weapons, https://www.forgottenweapons.com/manual-machine-guns/union-repeating-gun/

Bocetta, Sam, Machine Gun – How Hiram Maxim’s Deadly Invention Changed History, Military History Now, October 24, 2017, https://militaryhistorynow.com/2017/10/24/machine-gun-how-hiram-maxims-rapid-fire-invention-changed-history/