It was in "Berlin" Germany that the European nations met to discuss how to completely dominate Africa, since this was during the "Scramble for Africa," when many different nations were trying to capitalize on obtaining abundant natural resources.
President Jefferson commissioned the expedition shortly after the Louisiana Purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish American presence in this territory before Britain and other European powers
2.)The Global Era-1940s
In the Continental Era George Washington argued in favor of foreign policy—for nonalignment, not isolationism. During continental era, for American leaders wanted the continental expansion and protection of nation from potentially hostile neighbors, build economy through acquisition of land territory inhabited predominantly by Native Americans, who suffered the most from Western expansion to the Northwest Ordinance of 1787—called for dividing territory into grid work of townships; and started to grow quickly in population. People of US expansionism both government and Americans(US)( once from British tradition/empire) conceived as imperial republic •US looked seaward and landward•interruption of US commerce by British during Napoleonic War major cause of War of 1812.
1.)The Regional Era
Manifest Destiny-special virtues of Americans and their institutions/mission to redeem and remake world in image of America. The Americans had the idea of being in destiny under God to complete this sublime task-post-cold war, US foreign policy promoted political stability and economic expansion abroad, especially in Latin America and Asia.
