Events of Texas GameOnline version Test your knowledge of Texas History by building a timeline of some of the most significant events in Texas History. by Dallas Historical Society 1 Sort by the date each event took place The Mexican-American War Begins France establishes settlements in Texas Santa Anna becomes president of Mexico Texas becomes part of the United States Spain maps and claims Texas Mexico gains its independence from Spain Texas Rejoins the U.S. Texas joins the Confederacy The Civil War ends The Battle of the Alamo Oil is discovered at Spindletop, starting an oil boom in Texas.