Building an American Empire

["Land settlement" "Frontier and pioneer life" "National characteristics american" "Imperialism" "United states territorial expansion" "West (u.s.) history" "United states historical geography" "Territorial expansion" "Political aspects" "Historiography" "Frontier thesis" "American National characteristics" "Historical geography" "Case studies" "POLITICAL SCIENCE" "Political Ideologies" "Nationalism" "SOCIAL SCIENCE" "Discrimination & Race Relations" "Government" "National" "HISTORY" "19th Century" "North America"]