For 10 points, name this war, ended by the Treaty of Guadalupe Hidalgo, in which the U.S. gained California from another nation to the south.
During this war, a group of Irish Catholic combatants defected from the winning side to form the St. Patrick's Battalion for the losing side. One battle in this conflict saw the defense of a fort by a group of young children known as the Six Heroes. In addition to the Battle of Chapultepec, this war also saw the bombardment of Veracruz by forces under Matthew Perry and Winfield Scott. For 10 points, name this war, ended by the Treaty of Guadalupe Hidalgo, in which the U.S. gained California from another nation to the south.
During this war, a group of Irish Catholic combatants defected from the winning side to form the St. Patrick's Battalion for the losing side.
Mexican-American War [or Mexican War; prompt on First American Intervention]