What Did the 1919 Paris Peace Conference Have to Do with the Vietnam War?

All roads lead to Paris, or so it seemed to what remained of the young male generation following the Great War. And certainly for colonists desiring nations of their own, the only place worth a shot was Paris in 1919, especially when U.S. President Woodrow Wilson introduced the idea of "self-determination" in his famous "Fourteen …

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On the Radar: The “Acoustic Mirrors” of Denge–a Pre-Radar Warning System

Located along British coastlines, parabolic concrete structures such as these once served as interwar, pre-radar warning systems. They focused and concentrated sounds from the Channel, with the goal of detecting the approach of enemy planes. Image: Wikipedia. Read more here: Acoustic Mirror - Wikipedia, and the succeeding radar system: Chain Home - Wikipedia