Anderew C--- Mexican American War Timeline By MsOlson Period: Jan 1, 1845 to Jan 1, 1849 Mexican American War Mar 1, 1845 Texas Addmitted to the union Leaving president John Tyler signs congressonal resalution to annex Texas. Nov 5, 1845 US tryed to buy lannd (Sidel and Polk) Polk sends Sidel to Mexico to meet with the Mexicans and try to buy Texas and Californa. TheMexicans refused to buy meet with Sidel and didnt by the land Mar 5, 1846 US Troops Stationed at Disputed Border General Tylers army marched to the disoputed border that was both America and Mexico. May 5, 1846 US Declares War Polk asks the US congress to declare war on mexico. May 8, 1846 Battles of Palo Alto Tylers army wins the battle, driving the mexicans back across the Rio Grande Sep 17, 1847 Mexico City Surrendered Uarmy captures and occupies Mexico City. Feb 2, 1848 Treaty of Guadelupe Hidalgo Treaty of Guadelupe Hidalgo was signed by mexicans and sent to Wastionton.