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  without declaring war, Germany invades Poland. the coordinated air-and-land attack is conducted with such brutal efficiency that blitzkrieg becomes a feared offensive tactic.
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  Germany invades the soviet union without declaring war, despite massing troops at the border, the Germans encounter little opposition. Hitler is now fighting a two front war.
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  Japanese warplanes launched from aircraft attacked the american pacific fleet anchored at pearl harbor.
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  the greatest invasion in history, 2,500 american soldiers were dead on the french soil. allied commanders plan five coordinated landings along a 45- mile stretch of the Normandy coastline.
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  the first atomic bomb drops on Hiroshima on japan and killed about 146,000 people, the Japanese still wont accept the allied surrender terms.