1901to1945 19thcent 19thcentu 19thcentury 19thcenturyamericanhistory 19thcenturyus 19thcenturyuswestwardmigration 20thcentury africanamericanhistory africanamericans agriculturalsciences americans anthropology antiquities architecture armedforces art basicmaterialsindustries battles biography campaigns canadiantravelphotography centralsouth children civilwar civilwarhistory commercial confederatesoldiers conflict customs descriptions development emigration environment ethnic europe executivebranch fiction frontier general generalreference government heavyindustries historicalbiography history ideology immigration indianwars individualbattles informationscience irishhistory labor landscape lawenforcement legislativebranch library literaryreference localh localhistory michigan midwest militar military militarybio militarybiography militaryleaders militaryop militaryoperations minoritystudies miscellaneous miscellaneousbiography miscellaneouslaw miscellaneousnativeamericans miscellaneousworldhistory montana n nativeamerican nativenorthamericanhistory nativenorthamericanpeople nativenorthamericanpeoples naturaldisasters naturalterrain nature nebraska northamerica northdakota o organizedcrime orindustrialbuildings photography pioneerlife pioneers plainstribes politicalbiography politicaltheory politics portraitphotography public racerelations regimentalhistories regionalbiography regionalstudies religion socialchange socialclasses socialli sociallife socialsciences socialstratification sociology southdakota southeast southernregion southwest southwesterntribes state states strategy texas transportation travel travelessays travelphotography truecrime union unitedstates unitedstatesarmedforces unitedstatesarmy unitedstatescivilwar unitedstateshistory unitedstatesstudies vigilantejustice warnarratives wars weaponsofwar west westernunitedstates westvirginia westwardmigration worldhistory worldwarii wyoming