On that bloody 6th of June the operation Overlord started with a massive invasion and aerial attack. It is unbelievable how such an operation was kept in secrecy. The size and numbers of this invasion were unimaginable, but the Allies were decisive, persistent and cunning. Under attack of more than 160000 troops supported by 7000 vessels and 12000 aircraft, the German resistance was crushed. On that 6th of June, another front was opened.
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https://www.youtube.com/watch?v=Twjp92-5c2Q