These are the 21 key concepts that provide a basic level of understanding of World War II.  

For the fully enriched video presentation, with over 50 vintage photos, watch this episode on YouTube.
 
https://youtu.be/0i5XZ8fUxvU

I. Treaty of Versailles - Ended World War I, leaving Germany in chaos 

II.  Adolf Hitler – Dictatorial Leader of NAZI Germany

III.  Night of the Long Knives – Hitler's move to Kill his political rivals and seize control of Germany

IV.  Appeasement – Western Allies giving into Hitler's territorial demands to avoid having to fight another war

V.  Japan Invade China – Japan begins an imperial march conquering large parts of Asia

VI.  Molotov–Ribbentrop Pact – Shocking peace pact between Adolf Hitler's Germany and Joseph Stalin's Soviet Union

VII.  Invasion of Poland – Event that starts World War II

VIII. Blitzkrieg – New model of warfare relying on a concentrated spearhead of tanks and close air support.

IX. Battle of Britain – Germany's attempt to use air power to force Britain's surrender

X. Winston Churchill – British Leader that vowed Britain would never surrender

XI. Operation Barbarossa – Adolf Hitler's plan to conquer the Soviet Union

XII. Joseph Stalin – Dictatorial Leader of the Soviet Union that managed to repel the German Invasion

XIII. Pearl Harbor – Surprise Japanese attack on the U.S Naval Base in Hawaii

XIV. Franklin Roosevelt – Four Term United States President that lead the United States through the Great Depression and World War II

XV. Battle of Midway – Historic naval battle between U.S. and Japanese air craft carriers for control of the Pacific Ocean

XVI. Battle of Kursk – Largest land battle in history between Germany and the Soviet Union for control of the Eastern Front

XVII. Strategic Bombing Campaign – Use of masses of Heavy Bomber Airplanes to overcome inaccuracy of dropping bombs by destroying larger areas.

XVIII. D-Day – the Allied invasion of Europe across the English Channel onto the beaches of Normandy, France

XIX.  Battle of Leyte Gulf – Large land and naval battle between Japan and the United States for control of the Philippines

XX.  Yalta Conference – The meeting between the victorious powers, the Soviet Union and the United States, represented by Stalin and Roosevelt, to discuss the division of conquered lands.

XXI. Atomic Bomb – A super weapon utilizing the energy produced by nuclear fission, twice dropped on Japan to end World War II.

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