Westward Expansion By Matthewe6 Period: Jan 1, 1803 to Dec 31, 1890 Westward Expansion Apr 30, 1803 The Louisiana Purchase Nov 15, 1805 Lewis and Clark reach the Pacific Ocean Jun 12, 1812 War of 1812 May 28, 1830 The Indian Removal Act Apr 18, 1846 The Mexican American War Jan 24, 1848 The California Gold Rush Dec 31, 1890 The Amercan West has been Explored
