 Ramba uchinyora ndima iyi - Muna 1821, New Spain yakawana rusununguko rwayouye yakava Umambo hweMexico hwakagara kwenguva pfupi, hwakateverwa neRepublic yeMexico muna 1824. Nokudaro Mexico yakanga iri muridzi mutsva wenyika dziri kumaodzanyemba nokumavirira kweU.S. Territories. Texas, dunhu riri mukati meMexico, rakazivisa rusununguko rwaro kubva kuMexico muna 1836 zvichitevera Shanduko yeTexas. Republic of Texas yakavapo senyika yakaparadzana kubva muna 1836 kusvika muna 1845. 