Territorial expansion History 315 Imperialism 116 Foreign relations 111 Expansion territoriale 98 Histoire 93 Politics and government 73 more ... International relations 68 HISTORY 62 Political aspects 50 Frontier and pioneer life 44 Colonies 43 General 37 Indians of North America 34 Government relations 28 Impérialisme 28 Social aspects 27 State & Local 27 Relations 26 Colonial question 25 Diplomatic relations 24 Historiography 24 Race relations 24 Relations extérieures 24 Slavery 24 Discovery and exploration 21 Civilization 19 Discoveries in geography 19 Manifest Destiny 19 Philosophy 18 less ...