▁assistant ▁adj ut ant ▁within ▁ten ▁years . ▁In ▁the ▁War ▁of ▁the ▁Aust rian ▁Su cc ession ▁his ▁engineering ▁service ▁won ▁distinction ▁and ▁he ▁received ▁the ▁Cross ▁of ▁the ▁Order ▁of ▁St . ▁Louis ▁and ▁in ▁September , ▁ 1 7 4 8 ▁a ▁Captain ' s ▁commission . ▁ ▁In ▁ 1 7 5 4 ▁during ▁the ▁French ▁and ▁Indian ▁War ▁his ▁regiment ▁was ▁selected ▁for ▁service ▁in ▁Canada . ▁ ▁He ▁arrived ▁at ▁Fort ▁Front en ac ▁in ▁July , ▁ 1 7 5 5 ▁and ▁then ▁was ▁sent ▁to ▁Fort ▁Ni ag ara ▁to ▁improve ▁its ▁def enses . ▁ ▁In ▁July ▁and ▁August , ▁ 1 7 5 6 ▁he ▁assist ing ▁in ▁lay ing ▁out ▁the ▁sie ge ▁works ▁in ▁the ▁Battle ▁of ▁Fort ▁O sw ego . ▁ ▁After ▁came ▁construction ▁in ▁Montreal , ▁then ▁Fort ▁T icon der oga ▁and ▁Fort ▁Front en ac . ▁He ▁was ▁then ▁given ▁command ▁of ▁Fort ▁Ni ag ara ▁which ▁he ▁en larg ed ▁and ▁provided ▁with ▁new ▁earth work ▁def ences ▁( he ▁was ▁also ▁based ▁briefly ▁at ▁Fort ▁Rou illé ▁in ▁ 1 7 5 7 , ▁a ▁settlement ▁that ▁eventually ▁ended ▁in ▁British ▁hands ▁and ▁is ▁now ▁known ▁as ▁Toronto ). ▁In ▁October ▁ 1 7 5 7 , ▁he ▁was ▁removed ▁from ▁his ▁command ▁at ▁Fort ▁Ni ag ara ▁and ▁rejo ined ▁his ▁regiment ▁in ▁Montreal . ▁He ▁was ▁dispatch ed ▁again ▁as ▁commander ▁of ▁Fort ▁Ni ag ara ▁in ▁March , ▁ 1 7