APUSH By roshan.patadia17 Period: Oct 2, 1491 to Oct 2, 1607 Period 1 Period: Jan 1, 1780 to Oct 2, 1800 Period 3 Period: Jul 22, 1800 to Oct 26, 1848 Period 4 Oct 28, 1803 Lousiana Purchase Oct 28, 1820 Missouri Compromise Oct 28, 1848 Treaty of Guadalupe-Hidalgo