▁chose ▁it ▁as ▁a ▁gun - t ractor . ▁Representatives ▁of ▁the ▁French ▁company ▁Schne ider ▁were ▁also ▁present ▁at ▁the ▁trial , ▁and ▁they ▁ordered ▁a ▁number ▁of ▁Hol t ' s ▁ 4 5 hp ▁model , ▁known ▁as ▁the ▁" B aby ," ▁which ▁unlike ▁the ▁ 7 5 ▁and ▁ 1 1 0 ▁h p ▁models , ▁was ▁fully ▁track ed , ▁with ▁no ▁forward ▁till er ▁wheel . ▁▁ ▁The ▁Hol t ▁ 7 5 ▁model ▁gas oline - power ed ▁tra ctor ▁was ▁the ▁first ▁" standard " ▁tra ctor ▁adopted ▁in ▁quantity . ▁Hol t ▁vice ▁president ▁Murray ▁M . ▁Baker ▁reported ▁that ▁the ▁tra ctors ▁we ighed ▁about ▁ ▁and ▁had ▁. ▁The ▁company ▁could ▁not ▁meet ▁the ▁demand ▁for ▁their ▁tra ctors ▁and ▁lic ensed ▁other ▁manufact ur ers ▁to ▁build ▁their ▁design . ▁ ▁Over ▁the ▁next ▁four ▁years , ▁they ▁became ▁a ▁major ▁art illery ▁tra ctor , ▁mainly ▁used ▁to ▁ha ul ▁medium ▁guns ▁like ▁the ▁ 6 - inch ▁how itzer , ▁the ▁ 6 0 - p ound er , ▁and ▁later ▁the ▁ 9 . 2 - inch ▁how itzer . ▁ ▁H au led ▁art illery ▁and ▁supplies ▁▁ ▁The ▁Al lies ▁frequently ▁used ▁craw ler ▁tra ctors ▁in ▁place ▁of ▁horses ▁for ▁ha uling ▁art illery ▁and ▁other ▁supplies , ▁the ▁tracks ▁often ▁allowing ▁them ▁to ▁negoti ate ▁terrain ▁that ▁was ▁imp ass able ▁to ▁horse ▁teams ▁and ▁whe e led ▁vehicles . ▁The ▁British ▁Army