“I am amazed at the number of defense workers who are completely ignorant of history...”
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Then you should be astounded at the number of university graduates with history majors who are completely ignorant of history. I have spoken to a couple and they are equivalent to a math major who cannot tell you what ten percent of one hundred is without a calculator and a textbook. No chance at all that they could pass an eighth grade history final from fifty years ago.
I would not be surprised at those with degrees being ignorant, it is really those in positions that are supposed to be defending our country. How can you defend that which you don’t understand?
Schools abandoned teaching for propaganda long before I was born, so I could scarce expect anything from their students.