But this made any activity visible to both friend and foe. Night time combat was sometimes possible with primitive torches, oil lamps, and later electric lighting from flashlights or searchlights to illuminate small areas. There is invisible infrared light at one end of the spectrum and invisible ultraviolet light at the other end of the spectrum.However, light exists in different wave lengths at both ends of the spectrum as well as in the range of colors we can see naturally. Visible light is what we can see naturally.Passive systems use available natural light from the moon, stars, or skyglow.Active systems depend on artificial illumination light of some sort- flares, electric lights, etc.Utah Gun Collectors Association.ĭarkness ended each day’s battle for centuries.Īn army able to see at night has a tremendous tactical advantage over an enemy enveloped in darkness.įrom the collection of John S., displayed at the October, 2006 Utah Gun Collectors Association Gun Show.įirst, we must review five very important terms: ![]() Fight at Night: U.S Army Night Vision 1945-1980Ĭopyright 2007.
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