The A13 specification was produced prior to the second world war, calling for the development of a new cruiser tank.
ðɪ ˌeɪ θˈɜːtiːn spˌɛsɪfɪkˈeɪʃən wʌz pɹədˈuːst pɹˈaɪɚ tə ðə sˈɛkənd wˈɜːld wˈɔːɹ, kˈɔːlɪŋ fɚðə dɪvˈɛləpmənt əvə nˈuː kɹˈuːzɚ tˈæŋk.