APUSH Timeline By Yumna Siddiqi Period: Jan 1, 1491 to Jan 1, 1607 Period 1: 1491-1607 Period: Jan 1, 1754 to Jan 1, 1800 Period 3: 1754-1800 Jul 4, 1776 Declaration of Independence Period: Jan 1, 1800 to Jan 1, 1848 Unit 4 Jan 1, 1803 Louisiana Purchase Jan 1, 1820 Missouri Compromise Jan 1, 1848 Treaty of Guadalupe Hidalgo