Plymouth United F.C.
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Plymouth United Football Club was a football club from Plymouth probably formed prior to 1886. It is possibly the first football club to use the term United. The oldest existing club to use the term, Sheffield United, was founded before Plymouth United as a Cricket Club but didn't launch its football team until 1889.
As a pioneering club in Devon it played against Argyle Football Club in its first season and was a founding member of the Devon County Football Association. [1]