Mexican American Story By Clara333 1836 Texas gained its independence from Mexico 1845 Annexation of Texas --> become the 28th state Period: 1846 to 1848 Mexican American War 1848 Treaty of Guadeloupe Hidalgo : the treaty ended up the war, Mexico sell its northern territories for 15M$ 1854 Gadsen purchase, Mexico sold the south of Arizona for 10M$ 2006 Secure Fence act, private initiative but signe by Bush = physical border 2007 Peak of illegal immigrants population