History 42 Indians of North America Frontier and pioneer life 13 Ethnic relations 9 Discovery and exploration 7 Government relations 6 Missions 6 more ... Race relations 6 Description and travel 5 Spaniards 5 African Americans 4 British 4 Explorers 4 History, Military 4 Intercultural communication 4 Pioneers 4 Social conditions 4 Economic conditions 3 French 3 Fur trade 3 Negotiation 3 Travel 3 18th century 2 Administration 2 Antiquities 2 British Americans 2 Colonies 2 Colonists 2 Commerce 2 Culture conflict 2 less ...