Triple Alliance: an alliance between England, France, and the republic of the 7 united netherlands.
Triple Entente: was the alliance linking Russia, France, and Britain after the signing of the Anglo-Russian Entente.
Schlieffen Plan: The Schlieffen Plan was the German General Staff's early 20th-century overall strategic plan for victory in a possible future war in which the German Empire might find itself fighting on two fronts
Central Powers: in World War I the alliance of Germany and Austria-Hungary and other nations allied with them in opposing the Allies.
Allies: the powers of the Triple Entente (Great Britain, France, Russia), with the nations allied with them (Belgium, Serbia, Japan, Italy, etc., not including the United States), or, loosely, with all the nations (including the United States) allied or associated with them as opposed to the Central Powers.
Trench Warfare: a type of combat in which opposing troops fight from trenches facing each other
Eastern Front: Eastern Front was a term used during the First and Second World Wars to describe the battle fronts between lands controlled by Germany and land controlled by Russia or the Soviet Union.
Unrestricted Submarine Warfare: Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules.
Total War: a war that is unrestricted in terms of the weapons used, the territory or combatants involved, or the objectives pursued, esp. one in which the laws of war are disregarded.
Rationing: allow each person to have only a fixed amount of (a particular commodity).
Propaganda: