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1.
The Armies of Darkness is a compound wording for the German Army (Wehrmacht). It is just like the expression "Nazi Army" a word to "strengthen" the evilness and the badness of the German soldiers.
Indiana Jones III: The Last Crusade

"If we don't stop them from taking the Holy Grail the Armies of Darkness will run over Europe!"
by The_Emperor July 14, 2009