Patton's Ghosts
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So called, because they were exceptionally quiet and sneaky. There is a story that one actually snuck up on a King Tiger from the rear and knocked it out.
Was made back when Americans actually built things that lasted and some may still be in use today, 75 years after WW2 ended.
https://en.m.wikipedia.org/wiki/M8_Greyhound
More than you want to know...
Link to video