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1、WestwardMovementperiod:betweentheearly17thandlate19thcenturiesAnglo-AmericanpeoplesandtheirsocietiesexpandedfromtheAtlanticCoasttothePacificCoastacrosswhatwasoftencalledtheAmericanfrontier.Reasons:materialviewofthelandanditsanimalsandplantsMaterialrichness:land,timber,beave
2、r,buffaloStage2Stage3Stage1IttookAmericansacenturyandahalftoexpandasfarwestastheAppalachianMountains,afewhundredmilesfromtheAtlanticcoast.Ittookanother50yearstopushthefrontiertotheMississippiRiver.By1863,fewerthan100,000pioneershadcrossedtheMississippi.By1850,pioneershadpus
3、hedtheedgeofsettlementallthewaytoTexas,theRockyMountainandthePacificOcean.ThousandsoffamilieschalkedGTT(GonetoTexas)ontheirgatesorontheirwagons,andjoinedthetrekwestward.NorthwestSouthwestRockyMountainsPacificCoastMiddleWestFloridaSoutheastNortheastNewYorkStateThetwomajormou
4、ntainranges1.TheLouisianaPurchaseIn1803theUSbought2.6millionsquarekmfromFrancefor$15million.1acre/3cents,sizedoubled.NapoleonusedthemoneytofinancehiswarsinEurope.HealsohopedtosecuretheUSasanallyagainstEngland.ThelandintheLouisianaPurchaseconstitutes23%oftoday’sUSA.TheLouisi
5、anaPurchase的TheLouisianaPurchaseThePurchasewasoneofseveralterritorialadditionstotheU.S.TheLouisianaPurchaseThepurchasewasavitalmomentinthepresidencyofThomasJefferson.Atthetime,itfaceddomesticoppositionasbeingpossiblyunconstitutional.AlthoughhefeltthattheUSConstitutiondidnot
6、containanyprovisionsforacquiringterritory,JeffersondecidedtopurchaseLouisianabecausehefeltuneasyaboutFranceandSpainhavingthepowertoblockAmericantradeaccesstotheportofNewOrleans.TheLouisianaPurchaseCultivationofaPotentialRivaloftheBritishNapoleonBonaparte,uponcompletionofthe
7、agreement,stated,“ThisaccessionofterritoryaffirmsforeverthepoweroftheUnitedStates,andIhavegivenEnglandamaritimerivalwhosoonerorlaterwillhumbleherpride.”(1804–1806)1804,PresidentThomasJeffersonsentMeriwetherLewisandWilliamClarktoexplorethevastLouisiana.ThoughJeffersonstatedt
8、hegoalwastofinda"direct&practicablewatercommunicationacrossthiscontinent,forthepur
