ém inaire ▁de ▁Québec . ▁He ▁served ▁in ▁the ▁milit ia ▁def ending ▁the ▁town ▁of ▁Quebec ▁during ▁the ▁sie ge ▁by ▁the ▁Americans ▁in ▁ 1 7 7 5 - 6 . ▁He ▁participated ▁in ▁the ▁campaign ▁at ▁Lake ▁Champ lain , ▁becoming ▁lieutenant , ▁and ▁was ▁taken ▁prisoner ▁in ▁ 1 7 7 7 ▁at ▁the ▁Battle ▁of ▁Sar at oga . ▁De ▁B onne ▁continued ▁to ▁serve ▁in ▁the ▁milit ia ▁after ▁this ▁time , ▁becoming ▁colon el ▁in ▁ 1 8 0 9 . ▁He ▁studied ▁law ▁at ▁Montreal ▁and ▁qualified ▁as ▁a ▁lawyer ▁and ▁not ary ▁in ▁ 1 7 8 0 . ▁ ▁De ▁B onne ▁inherited ▁the ▁se igne ury ▁of ▁S ault - S ain te - Marie ▁from ▁his ▁father ; ▁he ▁acquired ▁additional ▁properties ▁over ▁the ▁years . ▁In ▁ 1 7 8 1 , ▁he ▁married ▁Louise , ▁daughter ▁of ▁Michel ▁Chart ier ▁de ▁Lot bin ière ; ▁they ▁separated ▁ ▁by ▁mut ual ▁consent ▁in ▁ 1 7 8 2 . ▁In ▁ 1 7 8 8 , ▁he ▁was ▁named ▁a ▁justice ▁of ▁the ▁peace . ▁De ▁B onne ▁was ▁a ▁director ▁of ▁the ▁Thé âtre ▁de ▁Société , ▁formed ▁in ▁Montreal ▁in ▁ 1 7 8 9 . ▁He ▁was ▁elected ▁to ▁the ▁Legisl ative ▁Assembly ▁of ▁Lower ▁Canada ▁for ▁York ▁in ▁ 1 7 9 2 ; ▁he ▁was ▁elected ▁again ▁in ▁Tro is - R ivi ères ▁in ▁ 1 7 9 6 ▁and ▁then ▁again ▁in