War with Mexico By abbyml11 May 7, 1821 Mexico wins independence; Becknell reaches Santa Fe Mexico wins independence; Becknell reaches Santa Fe May 7, 1836 The Battle of The Alamo The Battle of the Alamo May 7, 1846 California becomes independent; Congress declares war on Mexico California becomes independent; Congress declares war on Mexico May 7, 1848 Treaty of Guadalupe Hidalgo Treaty of Guadalupe Hidalgo