For all information about George Washington crossing the Delaware River and its significance in allowing the Revolutionary War to continue:
George Washington's Mount Vernon website, "10 Facts About Washington's Crossing of the Delaware River," Retrieved from URL:
https://www.mountvernon.org/george-washington/the-revolutionary-war/the-trenton-princeton-campaign/10-facts-about-washingtons-crossing-of-the-delaware-river/, Retrieved: 2019-10-29.
"George Washington's Crossing of the Delaware River," Wikipedia, Retrieved from URL:
https://en.m.wikipedia.org/wiki/George_Washington%27s_crossing_of_the_Delaware_River, Retrieved: 2019-19-29.
For all information about "Cobra King":
(2017, April 17). TANK ENCYCLOPEDIA, "Assault Tank M4A3E2 Jumbo," by "ajpawley." Retrieved from URL: http://www.tanks-encyclopedia.com/ww2/US/m4a3e2-jumbo-assault-tank, Retrieved: 2019-10-11.
The U.S. Army Europe Public Affairs Office produced a very exciting press release history of "Cobra King" in 2009 which features many of the tank's actual crew recalling the battle.
(2009, February 24). U.S. ARMY EUROPE PUBLIC AFFAIRS OFFICE, "'Cobra King' Led 4th Armored Division Column that Relieved Bastogne During the Battle of the Bulge," by Dave Melancon.
From URL: https://media.defense.gov/2018/Mar/28/2001896059/-1/-1/0/2009-02-24-3_COBRA_KING_HISTORY.PDF,