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“Battle of Verdun Ends.” History.com, A&E Television Networks, 28 Oct. 2009, https://www.history.com/this-day-in-history/battle-of-verdun-ends.
“Battle of Tannenberg Begins.” History.com, A&E Television Networks, 28 Oct. 2009, https://www.history.com/this-day-in-history/battle-of-tannenberg-begins.
“Battle of Tannenberg.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., https://www.britannica.com/event/Battle-of-Tannenberg-World-War-I-1914.
“World War I.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., https://www.britannica.com/event/World-War-I.
“First Battle of the Marne Begins.” History.com, A&E Television Networks, 16 Nov. 2009, https://www.history.com/this-day-in-history/first-battle-of-the-marne-begins.
“Gallipoli Campaign.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., https://www.britannica.com/event/Gallipoli-Campaign.
History.com Editors. “Battle of Gallipoli.” History.com, A&E Television Networks, 9 Nov. 2009, https://www.history.com/topics/world-war-i/battle-of-gallipoli-1.
“Battle of Jutland.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., https://www.britannica.com/event/Battle-of-Jutland.
“Battle of Jutland, Greatest Naval Battle of WWI, Begins.” History.com, A&E Television Networks, 28 Oct. 2009, https://www.history.com/this-day-in-history/battle-of-jutland.