History 146 Frontier and pioneer life 87 Description and travel 34 Indians of North America 27 Pioneers 23 Histoire 21 Overland journeys to the Pacific 20 more ... Social conditions 19 Discovery and exploration 17 Social life and customs 17 Territorial expansion 17 Travel 15 Military life 13 Explorers 12 Women pioneers 12 History, Military 10 Race relations 9 Fur trade 8 Ethnic relations 7 History and criticism 7 Vie des pionniers 7 Outlaws 6 Women 6 American literature 5 Descriptions et voyages 5 Gold discoveries 5 Immigrants 5 Mormon pioneers 5 Social aspects 5 Voyages par terre jusqu'au Pacifique 5 less ...