▁at ▁t ac it ▁support ▁by ▁Britain ▁for ▁the ▁Confeder ate ▁States ▁of ▁America ▁during ▁the ▁war , ▁and ▁the ▁al liance ▁was ▁successful ▁in ▁termin ating ▁the ▁treat y ▁in ▁ 1 8 6 6 . ▁The ▁response ▁in ▁much ▁of ▁British ▁North ▁America ▁was ▁to ▁form ▁Canada ▁( 1 8 6 7 ), ▁which ▁was ▁expected ▁to ▁both ▁open ▁up ▁many ▁new ▁economic ▁opportun ities ▁inside ▁Canada ▁and ▁un ify ▁the ▁colon ies ▁against ▁growing ▁expansion ist ▁sent iments ▁in ▁the ▁United ▁States , ▁associated ▁with ▁the ▁Al aska ▁P urchase . ▁ ▁Att empt s ▁by ▁the ▁Liberal ▁Party ▁of ▁Canada ▁to ▁rev ive ▁free ▁trade ▁in ▁ 1 9 1 1 ▁led ▁to ▁a ▁political ▁victory ▁for ▁the ▁Conserv ative ▁Party , ▁which ▁war ned ▁that ▁Canada ▁would ▁be ▁an nex ed ▁by ▁the ▁Americans . ▁T alk ▁of ▁reci pro city ▁then ▁ended ▁for ▁dec ades . ▁ ▁Orig ins ▁Fac ed ▁with ▁the ▁ending ▁of ▁British ▁imperial ▁preference ▁when ▁the ▁British ▁Corn ▁La ws ▁( tar iffs ▁on ▁food ▁imported ▁to ▁Britain ) ▁were ▁repe aled ▁in ▁ 1 8 4 6 , ▁the ▁Canadian ▁business ▁community , ▁based ▁in ▁Montreal , ▁looked ▁south . ▁Mer ch ants ▁threatened ▁to ▁push ▁for ▁an nex ation ▁to ▁the ▁United ▁States ▁unless ▁London ▁negoti ated ▁a ▁free ▁trade ▁deal ▁with ▁Washington . ▁In ▁ 1 8 5 4 , ▁they ▁achieved ▁what ▁they ▁wanted ▁in ▁the ▁El gin – Mar cy ▁Tre aty . ▁It ▁listed ▁most ▁Canadian ▁raw