| Term | Definition |
| Benito Mussolini | Dictator of Fascist Italy |
| Adolf Hitler | Dictator of Fascist Germany |
| Josef Stalin | Dictator of Communist USSR |
| Winston Churchill | Prime Minister of Great Britain AFTER 1940 |
| Franklin Roosevelt | President of USA 1933-1945 (April) |
| Neville Chamberlain | British Prime Minister 1939-1940 |
| Harry S Truman | President of USA 1945-1953 |
| isolationism | Goal of keeping the USA out of European conflicts |
| Ethiopia | Country invaded by Italy in 1935 |
| Hideki Tojo | Prime Minister/General of Japan |
| Hirohito | Emperor of Japan until 1989 |
| Axis Powers | Alliance between Italy, Germany and Japan |
| Allied Powers | Alliance between UK, USSR, USA, France, Canada, etc |
| appeasement | strategy of giving into an enemy's demands to satisfy them |
| blitzkrieg | the war tactic of rapid movement and encirclement with motorized forces |
| Battle of the Atlantic | the fight for control of the ocean shipping lanes between U-Boats and Allied ships |
| neutral | not participating in a conflict |
| draft | to be ordered to serve in a country's armed forces |
| enlist | to join the armed forces voluntarily (by choice) |
| Atlantic Charter | USA-UK agreement to create a fair settlement after the war |
| scorched earth | Soviet tactic of destroying the useful resources as they retreated before the Germans |
| Midway | First defeat of the Japanese Navy in 350 years |
| Normandy | site of Allied invasion of occupied France (1944) |
| Kursk | largest battle of World War 2, major German defeat |
| island hopping | Allied strategy of capturing some Japanese Pacific bases and skipping over others |
| unorthodox | unusual, out of the ordinary |
| fanatic | extreme enthusiasm, crazed excitement |
| vulnerable | exposed to danger |
| Hiroshima | first city destroyed by atomic bombing in 1945 |
| Nagasaki | second city destroyed by atomic bombing in 1945 |
| atrocity | war crime, act of brutality done by a military force |
| Holocaust | Germany's planned mass murder of European Jews |