Science fiction author Keith Laumer had a few ideas along these lines as far back as the 1960s: https://en.wikipedia.org/wiki/Bolo_%28tank%29 https://en.wikiped

Science fiction author Keith Laumer had a few ideas along these lines as far back as the 1960s: https://en.wikipedia.org/wiki/Bolo_%28tank%29 https://en.wikipedia.org/wiki/Bolo_%28tank%29