Cjoverlord7 Cjoverlord7 30-11-2020 History contestada How did the border dispute between Mexico and Texas affect the Mexican-American War? It became a source of conflict once Texas became a part of the United States. It increased the value of land that contained many natural resources. It became a source of conflict once Mexico won its independence from Spain. It decreased the value of land that the United States and Texas fought over.