History 40 Slavery 27 Politics and government 26 Extension to the territories 19 Japanese 17 Emigration and immigration 16 Description and travel 15 more ... Compromise of 1850 13 Social conditions 12 Chinese 10 Travel 9 Chinese Americans 8 Gold discoveries 8 Legal status, laws, etc 8 Race relations 7 Gold mines and mining 6 Japanese Americans 6 Social life and customs 6 Germans 5 Personal narratives 5 Biography 4 Cultural assimilation 4 Emigration and immigration law 4 Ethnic groups 4 Ethnic identity 4 Foreign relations 4 Histoire 4 Land tenure 4 Law and legislation 4 Speeches in Congress 4 Acculturation 3 African Americans 3 Afro-Americana 3 Asian Americans 3 British 3 Conditions sociales 3 Ethnic relations 3 Ethnicity 3 Indians of North America 3 Legislators 3 less ...