Claudia Kra Mexican American War By MsOlson Period: Jan 1, 1845 to Jan 1, 1849 Claudia Kra Mexican American War Mar 1, 1845 Texas Admitted to the Union President John Tyler signs the Congress resolution to annex Texas, and Texas is now part of the union. Nov 1, 1845 US Tried to Buy Land (Sidel and Polk) Polk draws the importance to expanding Americas land in his campaign for president. Mar 1, 1846 US Troops Disputed Border Taylor's army marches into the south, into disputed territory. May 1, 1846 US Declares War Polk gets a letter from Taylor asking him to declare war on Mexico. Sep 24, 1846 Victory at Monterey Taylor and his army go to the city and defeat the forces of General Pedro de Ampudia. Sep 13, 1847 Mexico City Surrendered After the Battle of Mexico City, the US captured the city and took over it. May 25, 1848 Treaty of Guadelupe Hidalgo The peace treaty between Mexico and the United States was signed.