| arrow_right_alt | Term referring to Russia under communist rule |
| arrow_right_alt | Austrian heir whose assassination set off a chain of events resulting in WWI |
| arrow_right_alt | Combat where opposing armies fight from parallel sets of fortified ditches |
| arrow_right_alt | British passenger ship sunk by a German U-boat in 1915, angering the US |
| arrow_right_alt | Legal right of a people to form their own country and government |
| arrow_right_alt | War policy of firing on all ships, military and civilian, without warning |
| arrow_right_alt | Theater of WWI stretching along the French and German border from the Atlantic to the Alps |
| arrow_right_alt | Systematic deportation and execution of Armenians by the Ottoman government during WWI |
| arrow_right_alt | Woodrow Wilson's idealistic plan for peace following WWI |
unrestricted submarine warfare | arrow_right_alt | Russian term for a radical socialist |
| arrow_right_alt | New weapon innovated prior to WWI that could fire hundreds of bullets per minute |
| arrow_right_alt | War policy that targets civilians and the economy like soldiers, involving the entire country in the war effort |
| arrow_right_alt | Peace that formally ended WWI; heavily punished Germany for its role in the conflict |
| arrow_right_alt | Conflict between the communist Reds and anti-communist Whites immediately following the October Revolution |
| arrow_right_alt | New weapons innovated during WWI that used poison gases to kill or injure |
| arrow_right_alt | International association created after WWI designed to prevent future global conflicts |