History Territorial expansion Imperialism 91 Foreign relations 64 Politics and government 59 Political aspects 45 Colonies 37 больше ... International relations 36 Frontier and pioneer life 35 Indians of North America 29 Social aspects 25 Government relations 23 Relations 22 Slavery 22 Race relations 20 Colonial question 17 Diplomatic relations 17 Manifest Destiny 17 Civilization 16 Extension to the territories 16 Racism 16 Philosophy 15 Colonization 14 Discovery and exploration 14 History and criticism 14 Nationalism 13 Discoveries in geography 12 Historiography 11 National characteristics, American 11 Social conditions 11 меньше ...