The calendar didn't go back far enough, I was there in July of 2012 with my wife and niece. We all found it to be interesting and bigger than expected. A lot more displays and information than expected as well. The displays from World War I through the current action in Iraq were all available. Along with real vehicles, models of ships and planes, and maps to explain major battles. It was interesting for a all three of us.
If you are going, they do offer a decent AAA discount.
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