Westward Expanison By Klowjane Sep 1, 1811 Oregon Trail is established Apr 1, 1812 Santa Fe trail is established Sep 1, 1812 War of 1812 begins Jan 1, 1815 War of 1812 ends with Treaty of Ghent Jan 1, 1846 Mexican American War begins Jan 1, 1848 Mexican- American war ends with Treaty of Guadeloupe
