Frontier and pioneer life 7,999 History 1,060 Indians of North America 274 Pioneers 197 Description and travel 171 Social life and customs 151 Women pioneers 106 more ... Wars 85 Social conditions 82 Frontier and pioneer life in literature 81 History and criticism 78 Race relations 73 Territorial expansion 67 Overland journeys to the Pacific 65 Ethnic relations 60 Gold discoveries 57 Outlaws 57 Government relations 53 Travel 51 Politics and government 50 Cowboys 45 Social aspects 44 Colonies 43 In literature 42 Women 42 Discovery and exploration 41 Fur trade 40 American literature 36 Land settlement 34 Military life 34 less ...