ðə dˈaɪəmənd tˈiː kˈʌmpəni hæd ɐ lˈɔŋ hˈɪstɚɹi ʌv bˈɪldɪŋ ɹˈʌɡᵻd, mˈɪlətˌɛɹi vˈiəkəlz fɚðə jˈuː.ˈɛs. ˈɑːɹmi kwˈɔːɹɾɚmˌæstɚ kˈɔːɹ ænd hæd ɹˈiːsəntli pɹədˈuːst ɐ pɹˈoʊɾoʊtˌaɪp hˈɛvi vˈiəkəl fɚðə jˌuːˈɛs ˈɑːɹmi wˈɪtʃ, wɪð ɐ fjˈuː slˈaɪt mˌɑːdɪfɪkˈeɪʃənz mˈɛt bɹˈɪɾɪʃ ɹᵻkwˈaɪɚmənts ænd ɐn ɪnˈɪʃəl ˈɔːɹdɚ fɔːɹ tˈuːhˈʌndɹɪd wʌz vˈɛɹi kwˈɪkli fˈɪld.
The Diamond T Company had a long history of building rugged, military vehicles for the U.S. Army Quartermaster Corps and had recently produced a prototype heavy vehicle for the US Army which, with a few slight modifications met British requirements and an initial order for 200 was very quickly filled.